Haven't received it yet but I bought a Polar. Really only because I also asked the advice of the guy who is doing the programs and he said Polar is what they use at the school labs. They seemed to think they are very accurate when compared to other instruments they use. He also advised that I not throw money at one with all the bells and whistles. He said the two things I would want were the calorie count function and programmable zones. So, I ended up with a Polar H7. It was the highest rated HRM by Consumer Reports. I have to say that I have a love-hate relationship with technology. I totally understand it's value and while I don't always understand the technology of a variety of devices in my world I have discovered that I am quite able to learn. The problem is the learning takes time and although I enjoy knowing how things work and how to use them I am often frustrated by the multiplicity of functions that I neither need nor want. Just trying to set up bicycle computers can drive you crazy. So, I'm hoping this HRM will be relatively simple. If not I will have my new trainer around to help. I hope.