One-Hit Wonders

• 
• 3%
• have only posted one review

38 of the 1,208 reviewers have only reviewed this product. The One-Hit Wonders have rated this product an average of 3.5 while the reviewers who have posted more than one review have rated this product an average of 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.

Take-Back Reviewers

• 
• 41%
• have previously deleted reviews

496 of the 1,208 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.

• 
• 4%
• Used substantial repetitive phrases

50 of the 1,208 total reviews for this product use substantial repetitive phrases between them. These reviewers have rated this product an average of 4.6 while reviews without substantial repetitive phrases rated this product an average of 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.

Read more about our Phrase Repetition test.

• 
• 11%
• Substantial overlapping review history

128 of the 1,208 reviewers have substantial overlapping product review history. These reviewers have rated this product an average of 4.4 while the reviewers who have a more unique product review history rated this product an average of 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.

Read more about our Overlapping Review History test.

• 
• 10%
• Created over 20 days

We counted 1,208 reviews for this product over the span of 1,311 days, an average of 0.9 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 5 or fewer reviews on any given day.

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

• 8 Reviews on Jul 2, 2020 (Avg. rating: 4.9)
• 7 Reviews on Jun 18, 2019 (Avg. rating: 4.6)
• 7 Reviews on Aug 16, 2020 (Avg. rating: 3.9)
• 7 Reviews on Jul 3, 2019 (Avg. rating: 3.7)
• 7 Reviews on Aug 7, 2020 (Avg. rating: 2.9)
• 6 Reviews on Jul 31, 2017 (Avg. rating: 5.0)
• 6 Reviews on Jul 13, 2020 (Avg. rating: 4.8)
• 6 Reviews on Aug 6, 2020 (Avg. rating: 4.8)
• 6 Reviews on Jul 14, 2019 (Avg. rating: 4.7)
• 6 Reviews on Sep 2, 2019 (Avg. rating: 4.7)
• 6 Reviews on Jul 20, 2020 (Avg. rating: 4.7)
• 6 Reviews on Aug 23, 2020 (Avg. rating: 4.5)
• 6 Reviews on Jul 17, 2019 (Avg. rating: 4.3)
• 6 Reviews on Aug 9, 2019 (Avg. rating: 4.3)
• 6 Reviews on Aug 18, 2020 (Avg. rating: 4.3)
• 6 Reviews on Jun 25, 2019 (Avg. rating: 4.2)
• 6 Reviews on Jul 11, 2019 (Avg. rating: 4.2)
• 6 Reviews on Jul 24, 2019 (Avg. rating: 4.0)
• 6 Reviews on Jul 21, 2020 (Avg. rating: 4.0)
• 6 Reviews on Aug 13, 2018 (Avg. rating: 3.8)
Show All

In total, we found that 126 reviews were created on just 20 days. Although any days with a larger number of reviews than expected is suspicious, the discrepancy in ratings from reviews created on these high volume days and reviews created on other days isn't significant enough to rule out the possibility of it being due to random chance.

Read more about our Rating Trend test.

Brand Repeaters

• 
• 30%
• Reviewed other products from this brand

361 of the 1,208 reviewers have reviewed other products for this brand. While this is more Brand Repeaters than we'd expect to see, the discrepancy in ratings between the Brand Repeaters and non-repeaters isn't significant enough to rule out the possibility of it being due to random chance.

Read more about our Brand Repeats test.

• 
• 3%
• Unverified Purchases

38 of the 1,208 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.

• 
• 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 4.3, while the average ease score for reviewers in this category is 4.2. While this discrepancy is rather large, it is not quite large enough to rule out the possibility of it being due random chance.

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

2 of the 1,208 total reviews for this product admitted to receiving a free or discounted product in exchange for a review. 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 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.