This morning officially used it for the first time. My comment.... for a product that would normally cost me arms & legs but got it just for a thumb, I think it's AWESOME!!! HRM with the largest memory bank ever made and big screen to see the number clearly. I couldn't keep my eyes off the watch looking at heart beat changing every time I change my pace. So impressed with the technology. Recommend to all my friends out there to get one, especially those seriously want to lose weight.