Brand Loyalists

• 
• 8%
• Reviewed mostly products from this brand

101 of the 1,197 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

• 
• 3%
• Reviewed only products from this brand

40 of the 1,197 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.

One-Hit Wonders

• 
• 19%
• have only posted one review

225 of the 1,197 reviewers have only reviewed this product. The One-Hit Wonders have rated this product an average of 4.9 while the reviewers who have posted more than one review 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.

Never-Verified Reviewers

• 
• 29%
• have zero verified purchases

345 of the 1,197 reviewers have never written a verified purchase review. The Never-Verified Reviewers have rated this product an average of 4.9 while the reviewers who have written at least one verified purchase review 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.

Take-Back Reviewers

• 
• 1%
• have previously deleted reviews

10 of the 1,197 reviewers have had at least one of their past reviews for another product deleted. While this is more Take-Back Reviewers than we'd expect to see, it does not appear to have a significant impact on the overall rating.

Read more about our Suspicious Reviewers 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 4.6, while the average ease score for reviewers in this category is 4.2. 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.

• 
• 19%
• Created over 20 days

We counted 1,197 reviews for this product over the span of 848 days, an average of 1.4 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 7 or fewer reviews on any given day.

However, we see the following 20 days exceeding this threshold:

• 24 Reviews on Feb 20, 2015 (Avg. rating: 4.9)
• 24 Reviews on Feb 28, 2015 (Avg. rating: 4.9)
• 15 Reviews on Mar 10, 2015 (Avg. rating: 4.9)
• 13 Reviews on Feb 13, 2015 (Avg. rating: 4.9)
• 12 Reviews on Feb 16, 2015 (Avg. rating: 5.0)
• 12 Reviews on Mar 1, 2015 (Avg. rating: 4.6)
• 11 Reviews on Mar 5, 2015 (Avg. rating: 4.6)
• 10 Reviews on Sep 25, 2015 (Avg. rating: 4.5)
• 9 Reviews on Feb 12, 2015 (Avg. rating: 5.0)
• 9 Reviews on Feb 14, 2015 (Avg. rating: 5.0)
• 9 Reviews on Feb 18, 2015 (Avg. rating: 4.9)
• 9 Reviews on Mar 29, 2016 (Avg. rating: 4.9)
• 9 Reviews on Feb 17, 2015 (Avg. rating: 4.6)
• 9 Reviews on Mar 2, 2015 (Avg. rating: 4.4)
• 8 Reviews on Feb 11, 2015 (Avg. rating: 5.0)
• 8 Reviews on Feb 25, 2015 (Avg. rating: 4.9)
• 8 Reviews on May 30, 2015 (Avg. rating: 4.9)
• 8 Reviews on Apr 19, 2016 (Avg. rating: 4.9)
• 8 Reviews on Mar 4, 2015 (Avg. rating: 4.8)
• 8 Reviews on Jan 23, 2016 (Avg. rating: 4.6)
Show All

In total, we found that 223 reviews were created on just 20 days. This is an excessively high number of reviews submitted on these high volume days.

Read more about our Rating Trend test.

• 
• 64%
• Unverified Purchases

766 of the 1,197 total reviews for this product are unverified purchases. While this is a higher percentage of unverified purchases than we'd expect to see, it does not appear to have a significant impact on the overall rating.

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.

• 
• 48%
• 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 2 groups with a statistically significant greater concentration than what we'd expect to see:

• 0-5 words: 21.6% (Avg. rating: 4.8)
• 16-25 words: 26.7% (Avg. rating: 4.9)

In total, we found that 579 reviews (or 48%) are within an overrepresented word count group. While this is more reviews from overrepresented word count groups than we'd expect to see, these reviews do not appear to have a significant impact on the overall rating.

Read more about our Word Count Comparison test.

• 
• 54%
• From reviewers with an overrepresented participation

We see the following 1 participation group with a statistically significant greater concentration than what we'd expect to see:

• Reviewers with 1-5 Reviews: 54.3% (Avg. rating: 4.8)

In total, we found that 650 reviewers (or 54%) are within an overrepresented participation group. This is an excessively high number of reviewers in overrepresented participation groups.

Read more about our Reviewer Participation test.

• 
• 8%
• Used substantial repetitive phrases

96 of the 1,197 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.

• 
• 12%
• Substantial overlapping review history

149 of the 1,197 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.

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

• 
• 0%
• Admitted to receiving an incentive

We didn't detect any reviews that used language indicating they were incentivized.
Read more about our Incentivized Reviews test. Check out our study showing that Incentivized Reviewers are much more likely to leave a positive review.

• 0
• Reviews have been deleted

We have not discovered any deleted reviews for this product.

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.