• 
• 26%
• Created over 17 days

We counted 340 reviews for this product over the span of 2,111 days, an average of 0.2 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 17 days exceeding this threshold:

• 10 Reviews on Sep 6, 2019 (Avg. rating: 4.2)
• 7 Reviews on Sep 14, 2019 (Avg. rating: 4.0)
• 7 Reviews on Sep 5, 2019 (Avg. rating: 3.7)
• 6 Reviews on Sep 8, 2019 (Avg. rating: 4.3)
• 6 Reviews on Sep 4, 2019 (Avg. rating: 3.8)
• 5 Reviews on Sep 13, 2019 (Avg. rating: 4.8)
• 5 Reviews on Sep 16, 2019 (Avg. rating: 4.4)
• 5 Reviews on Sep 10, 2019 (Avg. rating: 4.0)
• 5 Reviews on Oct 1, 2019 (Avg. rating: 3.8)
• 5 Reviews on Sep 1, 2019 (Avg. rating: 3.6)
• 5 Reviews on Sep 29, 2019 (Avg. rating: 3.4)
• 4 Reviews on Dec 29, 2018 (Avg. rating: 5.0)
• 4 Reviews on Sep 23, 2019 (Avg. rating: 4.3)
• 4 Reviews on Oct 3, 2019 (Avg. rating: 3.8)
• 4 Reviews on Sep 28, 2019 (Avg. rating: 3.3)
• 4 Reviews on Sep 19, 2019 (Avg. rating: 3.0)
• 4 Reviews on Oct 2, 2019 (Avg. rating: 3.0)
Show All

In total, we found that 90 reviews were created on just 17 days. This is an excessively high number of reviews submitted on these high volume days.

Read more about our Rating Trend test.

Take-Back Reviewers

• 
• 48%
• have previously deleted reviews

162 of the 340 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, the discrepancy in ratings between the Take-Back Reviewers and reviewers who don't have any deleted reviews in their history isn't significant enough to rule out the possibility of it being due to random chance.

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 4.3, while the average ease score for reviewers in this category is 4.1. While this discrepancy is rather large, it is not quite large enough to rule out the possibility of it being due random chance.

• 
• 70%
• Used substantial repetitive phrases

238 of the 340 total reviews for this product use substantial repetitive phrases between them. This is an excessively large percentage which may indicate unnatural reviews.

Read more about our Phrase Repetition test.

• 
• 3%
• Unverified Purchases

9 of the 340 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.

• 
• 0%
• Have an overrepresented word count

We didn't find any review word count groups that had a statistically significant greater concentration than what we'd expect to see in this category.
Read more about our Word Count Comparison test.

• 
• 38%
• Substantial overlapping review history

130 of the 340 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.

• 
• 12%
• 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 101-200 Reviews: 12.1% (Avg. rating: 3.8)

In total, we found that 41 reviewers (or 12%) are within an overrepresented participation group. 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 Reviewer Participation test.

Brand Repeaters

• 
• 9%
• Reviewed other products from this brand

31 of the 340 reviewers have reviewed other products for this brand. 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 Brand Repeats 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.