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ADATA Premier SP550 120GB 2.5 Inch SATA III Solid State Drive
More product info From ADATA

Amazon Reviews for  ADATA Premier SP550 120GB 2.5 Inch SATA III Solid State Drive
Rating:
112 Ratings
113 Reviews
("Ratings" vs. "Reviews")
2% of potentially unnatural reviews removed (why?)
Adjusted:
View/Edit Adjustment
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Report Info:
Last Updated: Dec 4, 2019
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Note: While Amazon.ca claims 112 Ratings, we counted 113 Reviews available on their site.
Note: We only analyze "reviews" and ignore one-tap "ratings".

Report Card

Pass Overall Grade
FAIL Suspicious Reviewers
WARN Deleted Reviews
WARN Rating Trend
WARN Phrase Repetition
WARN Reviewer Participation
PASS Unverified Purchases
PASS Word Count Comparison
PASS Overlapping Review History
PASS Reviewer Ease
PASS Brand Repeats
PASS Incentivized Reviews

Most Trusted Reviews

5/5
Sep 8, 2019      
100% TRUST
  • Verified Purchaser
  • Take-Back Reviewer (2 deleted Reviews; avg. rating: 5.0)
  • Brand Repeater (2 of 50 reviews for this brand; avg rating: 5.0)
  • Easy Grader (avg. rating: 4.7)


Least Trusted Reviews

I have had it for about 2 years now and ... [Go to full review]
Jun 7, 2019      
5% TRUST
  • Unverified Purchaser
  • Overrepresented Participation (posted 10 Reviews)
  • Critical Reviewer (avg. rating: 3.2)


Analysis Details

Fail Suspicious Reviewers

Never-Verified Reviewers


3 of the 113 reviewers have never written a verified purchase review. The Never-Verified Reviewers have rated this product an average of 3.0 while the reviewers who have written at least one verified purchase review rated this product an average of 4.6. 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.

from never-verified reviewers

from reviewers with at least one verified purchase review


3.0
4.6


Read more about our Suspicious Reviewers test.

Warn Deleted Reviews

We discovered a total of 1 deleted Review for this product, with an average rating of 5. 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.

5.0 average rating of deleted reviews

5.0


Show distribution of deleted reviews

Warn Rating Trend

  • 10%
  • Created over 3 days

We counted 113 reviews for this product over the span of 1,352 days, an average of 0.1 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 2 or fewer reviews on any given day.

However, we see the following 3 days exceeding this threshold:In total, we found that 11 reviews were created on just 3 days. Although any days with a larger number of reviews than expected is suspicious, these reviews do not appear to have a significant impact on the overall rating.

from reviews created on high volume days

from reviews created on normal volume days


4.6
4.6


Read more about our Rating Trend test.

Warn Phrase Repetition
Reviews that contain one of these phrases are NOT necessarily devalued; read more about how this test works here.

Common Phrases in Titles:
2 reviews
(5.0/5)


5 of the 113 total reviews for this product use substantial repetitive phrases between them. This is an excessively large percentage which may indicate unnatural reviews.

from reviews with substantial repetitive phrases

from reviews without substantial repetitive phrases


4.6
4.6


Read more about our Phrase Repetition test.

Warn Reviewer Participation

  • 43%
  • 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:In total, we found that 49 reviewers (or 43%) are within an overrepresented participation group. While this is more reviews from overrepresented participation groups than we'd expect to see, the discrepancy in ratings between reviewers in an overrepresented participation groups and all other reviewers isn’t significant enough to rule out the possibility of it being due to random chance.

From reviewers with an overrepresented participation

From reviewers with a properly represented participation


4.7
4.5


Read more about our Reviewer Participation test.

Pass Unverified Purchases

5 of the 113 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.

from unverified purchasers

from verified purchases


3.8
4.6


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.

Pass Word Count Comparison

  • 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.

Pass Overlapping Review History
Reviewers of this product have ALSO reviewed the following products:

4% also reviewed:
Samsung 850 EVO Parent by Samsung

Does not include products
from the same brand


25 of the 113 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.

from reviewers with substantial overlapping history

from reviewers without a substantial overlapping history


4.8
4.5


Read more about our Overlapping Review History test.

Pass 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 4.4, while the average ease score for reviewers in this category is 4.4.

4.4 Product's Average Ease Score

4.4 Category's Average Ease Score


4.4
4.4


Read more about our Reviewer Ease test.


Pass Brand Repeats

Brand Repeaters


4 of the 113 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.

from Brand Repeaters

from Non-Repeaters


5.0
4.6


Read more about our Brand Repeats test.

Pass Incentivized Reviews
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.