In our tests earlier this year of six digital scales that gave readings for weight and body fat, we found that one, the Qardio QardioBase, consistently overestimated weight by 6 to 10 pounds. When we asked Qardio to respond to our findings, the company told us that it was aware of the problem and said it was corrected. So we decided to test the revamped Qardio scale, one of the priciest in our ratings, to find out if that was the case.

The result: The replacement Qardio is much improved for weight accuracy, scoring good instead of poor, but the new sample consistently underestimated weight by 1 percent. As a result, it is still at the bottom of our ratings with an overall score of 56 (its previous score was 23). The Qardio's performance for weight repeatability remains unchanged, however, and it's still very good.

As with the other scales we tested (including the original Qardio scale), the new Qardio scale did not accurately measure body fat percentage. It received a fair score for this feature. For more information, see our body-fat scale review and our scale Ratings and buying guide.

How We Retested

To test weight accuracy of the repaired Qardio scale we weighed and re-weighed two of our testers while they held dumbbells of different sizes, both on a lab standard calibrated scale and on the replacement Qardio.

Qardio told Consumer Reports that the scales that will be on the market soon will have additional feet to make them more stable. This defect in the scale's design was not highlighted in our original report because of the low score the model received overall, but a wobbly scale makes it harder to use and more difficult to get an accurate reading. In the meantime consumers can request additional feet for their scale at Customers who have a defective scale can ask for a refund or replacement at the same address.