Bests & Worsts Reviews from Amazon

I bought this based on all the positive reviews, but apparently I got a bad one. My BP is high, but 255/148 is ridiculous. I tried it several times with similar results, and then on two others with established low BP, and their readings were also extremely high (190/110 and the like). Also, if a cuff is inflating to this pressure, it would hurt, but this was barely squeezing, so either the calibration was really bad, or it had a leak. Also, while I can't speak for everyone, my wrist has a tapered shape, while this cuff seemed to only contour to a very straight wrist, so adjust as I might, it was still too loose at the top, which may have contributed to the accuracy issue. But with 3 different people, it was probably a bad unit.