iRobot Roomba 650 Robotic Vacuum Cleaner (Vacuum + Replenishment Kit) From iRobot Report Feedback
Last Updated: 7/16/2017
Click a test to jump to details
Most Trusted Reviews
- Verified Purchaser
- Critical Reviewer (avg. rating: 3.5)
4.2 Product's Average Ease Score
4.1 Category's Average Ease Score
Read more about our Reviewer Ease test.
41 of the 5,211 total reviews for this product use substantial repetitive phrases between them. These reviewers have rated this product an average of 4.8 while reviews without substantial repetitive phrases rated this product an average of 4.4. 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 the same brand
281 of the 5,211 reviewers have substantial overlapping product review history. These reviewers have rated this product an average of 4.6 while the reviewers who have a more unique product review history rated this product an average of 4.4. 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.
Example critical reviews
-0.5 average net helpfulness for positive reviews
-2.9 average net helpfulness for negative reviews
Read more about our Skewed Helpfulness test.
We discovered a total of 15 deleted reviews for this product, with an average rating of 4.3. 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.
4.3 average rating of deleted reviews
Read more about our Deleted Reviews test.
- Created over 65 days
We counted 5,211 reviews for this product over the span of 1,768 days, an average of 2.9 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 10 or fewer reviews on any given day.
However, we see the following 65 days exceeding this threshold:
521 of the 5,211 reviewers have only reviewed this product. While this is more One-Hit Wonders than we'd expect to see, it does not appear to have a significant impact on the overall rating.
402 of the 5,211 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.
482 of the 5,211 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.
- Have an overrepresented word count
Read more about our Word Count Comparison test.
- From reviewers with an overrepresented participation
Read more about our Reviewer Participation test.
1 of the 5,211 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, or check out our study showing that Incentivized Reviewers are much more likely to leave a positive review.