This looks great and I wanted to do more research on it. Here is a review that I found.
Polar M600 Review
I bought a Polar M600 Smartwatch/GPS running watch and used it for a month. In this review I'll tell you all about it. From how to use it to is it worth buying it
I like the big fonts and easy read face. This is most important for me as a low-vision runner. The fact that it is waterproof is a plus, but most cheapo digital watches are waterproof to depths deeper than I can swim. Still, the waterproof feature is a must have to protect against sewat.