More product info
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Fail Overall Grade
FAIL Suspicious Reviewers
FAIL Reviewer Ease
WARN Deleted Reviews
WARN Unverified Purchases
WARN Brand Repeats
WARN Reviewer Participation
PASS Rating Trend
PASS Word Count Comparison
PASS Phrase Repetition
PASS Overlapping Review History
PASS Sample Reviews
Other analysis for this product:
Most Trusted Reviews
excellent produkt gooooood [Go to full review]
Nov 10, 2012
- Verified Purchaser
- Overlapping Review History: reviewed 4 of 9 top products
- Critical Reviewer (avg. rating: 7.9)
Least Trusted Reviews
Fantastic stuff I use it all the time the only ... [Go to full review]
Apr 6, 2010
- Unverified Purchaser
- Never-Verified Reviewer
- Single-Day Reviewer (posted all reviews on Apr 6, 2010)
- Take-Back Reviewer (1 deleted review; avg. rating: 8.0)
- Brand Loyalist (2 of 3 reviews for this brand; avg rating: 8.5)
- Overrepresented Participation (posted 3 reviews)
- Easy Grader (avg. rating: 9.0)
Fail Suspicious Reviewers
906 of the 2,659 reviewers have only reviewed this product. This is an excessively large percentage of One-Hit Wonders which may indicate unnatural reviews.
1,158 of the 2,659 reviewers have never written a verified purchase review. While this is more Never-Verified Reviewers than we'd expect to see, it does not appear to have a significant impact on the overall rating.
457 of the 2,659 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.
516 of the 2,659 reviewers have written multiple reviews but posted all of them on a single day. While this is more Single-Day Reviewers than we'd expect to see, the discrepancy in ratings between the Single-Day Reviewers and all other reviewers isn't significant enough to rule out the possibility of it being due to random chance.
Fail Reviewer Ease
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 8.9, while the average ease score for reviewers in this category is 8.8. 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.
8.9 Product's Average Ease Score
8.8 Category's Average Ease Score
Read more about our Reviewer Ease test.
Warn Deleted Reviews
We discovered a total of 51 deleted reviews for this product, with an average rating of 8.7. 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:
- 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.
- We have no information on reviews that were never published in the first place.
- 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.
8.7 average rating of deleted reviews
Show distribution of deleted reviews
Warn Unverified Purchases
1,476 of the 2,659 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.
Warn Brand Repeats
55 of the 2,659 reviewers have reviewed multiple products but half or more of their reviews are for this brand. While this is more Brand Loyalists than we'd expect to see, the discrepancy in ratings between the Brand Loyalists and non-loyalists isn't significant enough to rule out the possibility of it being due to random chance.
Warn Reviewer Participation
- 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:
Pass Rating Trend
- Created over 9 days
We counted 2,659 reviews for this product over the span of 3,563 days, an average of 0.7 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 9 days exceeding this threshold:
Pass Word Count Comparison
- 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.
Read more about our Word Count Comparison test.
Pass Phrase Repetition
Reviews that contain one of these phrases are NOT necessarily devalued; read more about how this test works here.
12 of the 2,659 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.
Pass Overlapping Review History
Reviewers of this product have ALSO reviewed the following products:
992 of the 2,659 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.
Pass Sample Reviews
16 of the 2,659 total reviews for this product mentioned the word "sample" within their review. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.