• 1,295
• Reviews have been deleted

We discovered a total of 1,295 deleted Reviews for this product, with an average rating of 4.4. Even though deleted reviews don't affect the average rating, the fact that action was taken to delete reviews raises some red flags about the integrity of the reviews for the product as whole.

There are a few limitations to keep in mind regarding the Deleted Reviews test:

1. We don't have a magic ability to collect every single deleted review; we can only identify reviews as deleted if we collect them on one date and then notice they are no longer visible on a subsequent date.
2. We have no information on reviews that were never published in the first place.
3. We also don't know why these reviews were removed. It could be action from the platform, personal decision by the review author, part of an entire account closure, even some data error on our part, etc.

Read more about our Deleted Reviews test.

Show distribution of deleted reviews

On Oct 3, 2016, Amazon prohibited incentivized reviews, however we still test for them since there are still millions in our dataset.

• 
• 52%
• Admitted to receiving an incentive

67 of the 129 total reviews for this product admitted to receiving a free or discounted product in exchange for a review. Incentivized reviews have rated this product an average of 0.6 while reviews that were not incentivized rated this product an average of 0.1. Based on our statistical modeling, the discrepancy in average rating between these two groups is significant enough to believe that the difference is not due to random chance, and may indicate that there are unnatural reviews.

Read more about our Incentivized Reviews test. Check out our study showing that Incentivized Reviewers are much more likely to leave a positive review.

Brand Repeaters

• 
• 77%
• Reviewed other products from this brand

99 of the 129 reviewers have reviewed other products for this brand. This is an excessively large percentage of Brand Repeaters which may indicate unnatural reviews.

Brand Loyalists

• 
• 32%
• Reviewed mostly products from this brand

41 of the 129 reviewers have reviewed multiple products but half or more of their reviews are for this brand. This is an excessively large percentage of Brand Loyalists which may indicate unnatural reviews.

Brand Monogamists

• 
• 7%
• Reviewed only products from this brand

9 of the 129 reviewers have reviewed multiple products, but only for this brand. This is an excessively large percentage of Brand Monogamists which may indicate unnatural reviews.

Read more about our Brand Repeats test.

Take-Back Reviewers

• 
• 53%
• have previously deleted reviews

69 of the 129 reviewers have had at least one of their past reviews for another product deleted. This is an excessively large percentage of Take-Back Reviewers which may indicate unnatural reviews.

Read more about our Suspicious Reviewers test.

• 
• 92%
• Have an overrepresented word count

In the graph above, we can see the distribution of review word counts for this product and the expected distribution for this category. We see the following 1 group with a statistically significant greater concentration than what we'd expect to see:

• 0-5 words: 92.3% (Avg. rating: 0.0)

In total, we found that 119 reviews (or 92%) are within an overrepresented word count group. These reviews have rated this product an average of 0.0, while all other reviews have rated this product an average of 4.8. Based on our statistical modeling, the discrepancy in average rating between these two groups is significant enough to believe that the difference is not due to random chance, and may indicate that there are unnatural reviews.

Read more about our Word Count Comparison test.

• 
• 0%
• Created over 42 days

We counted 129 reviews for this product over the span of 477 days, an average of 0.3 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 3 or fewer reviews on any given day.

However, we see the following 42 days exceeding this threshold:

• 24 Reviews on Jul 12, 2015 (Avg. rating: 4.6)
• 20 Reviews on Nov 22, 2015 (Avg. rating: 4.7)
• 17 Reviews on Nov 23, 2015 (Avg. rating: 4.6)
• 14 Reviews on Nov 29, 2016 (Avg. rating: 4.9)
• 14 Reviews on Jul 5, 2015 (Avg. rating: 4.7)
• 12 Reviews on Feb 12, 2015 (Avg. rating: 4.9)
• 11 Reviews on Jul 6, 2015 (Avg. rating: 4.7)
• 10 Reviews on Nov 6, 2016 (Avg. rating: 4.3)
• 9 Reviews on Jul 7, 2015 (Avg. rating: 4.7)
• 8 Reviews on Jul 10, 2015 (Avg. rating: 4.8)
• 8 Reviews on Jun 6, 2016 (Avg. rating: 4.6)
• 8 Reviews on Nov 23, 2016 (Avg. rating: 4.5)
• 7 Reviews on Jun 7, 2016 (Avg. rating: 4.9)
• 7 Reviews on Nov 24, 2016 (Avg. rating: 4.9)
• 7 Reviews on Sep 13, 2016 (Avg. rating: 4.0)
• 6 Reviews on May 31, 2016 (Avg. rating: 4.8)
• 6 Reviews on Nov 22, 2016 (Avg. rating: 4.8)
• 6 Reviews on Nov 2, 2016 (Avg. rating: 4.8)
• 6 Reviews on Oct 23, 2016 (Avg. rating: 4.8)
• 6 Reviews on Nov 5, 2016 (Avg. rating: 4.7)
• 6 Reviews on Jul 13, 2015 (Avg. rating: 4.3)
• 6 Reviews on May 29, 2016 (Avg. rating: 4.3)
• 6 Reviews on Oct 17, 2016 (Avg. rating: 4.3)
• 6 Reviews on Nov 7, 2016 (Avg. rating: 4.2)
• 5 Reviews on Nov 2, 2014 (Avg. rating: 5.0)
• 5 Reviews on Nov 17, 2014 (Avg. rating: 5.0)
• 5 Reviews on Dec 21, 2014 (Avg. rating: 5.0)
• 5 Reviews on Dec 16, 2015 (Avg. rating: 5.0)
• 5 Reviews on Oct 13, 2016 (Avg. rating: 4.8)
• 5 Reviews on Sep 26, 2016 (Avg. rating: 4.8)
• 5 Reviews on Sep 14, 2016 (Avg. rating: 4.8)
• 5 Reviews on Oct 13, 2014 (Avg. rating: 4.8)
• 5 Reviews on Nov 21, 2015 (Avg. rating: 4.8)
• 5 Reviews on Oct 28, 2016 (Avg. rating: 4.6)
• 5 Reviews on Jun 26, 2015 (Avg. rating: 4.6)
• 5 Reviews on Dec 3, 2016 (Avg. rating: 4.6)
• 5 Reviews on May 30, 2016 (Avg. rating: 4.4)
• 5 Reviews on Oct 24, 2016 (Avg. rating: 4.2)
• 5 Reviews on Jun 9, 2016 (Avg. rating: 4.2)
• 5 Reviews on Jun 1, 2016 (Avg. rating: 4.2)
• 5 Reviews on Nov 28, 2016 (Avg. rating: 4.2)
• 5 Reviews on Dec 25, 2016 (Avg. rating: 4.2)
Show All

In total, we found that 0 reviews were created on just 42 days. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
Read more about our Rating Trend test.

• 
• 9%
• Unverified Purchases

12 of the 129 total reviews for this product are unverified purchases. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.

Unverified purchases may be the result of Kindle Unlimited readers, buyers who didn't pay full price, or reviewers who did not purchase the product at Amazon. Read more about our Unverified Purchases test.

• 
• 1%
• Used substantial repetitive phrases

1 of the 129 total reviews for this product use substantial repetitive phrases between them. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.

Read more about our Phrase Repetition test.

• 
• 18%
• Substantial overlapping review history

23 of the 129 reviewers have substantial overlapping product review history. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.

Read more about our Overlapping Review History test.

• 
• 0%
• From reviewers with an overrepresented participation

We didn't find any participation groups that had a statistically significant greater concentration than what we'd expect to see in this category.
Read more about our Reviewer Participation test.

The ease score is the average rating for all reviews that a given reviewer submits. The average ease score for reviewers of this product is 3.4, while the average ease score for reviewers in this category is 3.9.