The Polar quality is there more problem on heart rate (FC the previous monitor, purchased in supermarkets to 30 sometimes gave breathtaking values), the clock display is customizable (3 lines, 1 with large characters) to make the clock visible + or FC, for example.
For cons, the watch does not store any data, so that sync on the computer (via a Polar accessory Flowlink 50) is limited to indicate activity in a given day such as time period, and an average value of heart rate . On the base model, ie without involving the watch a GPS sensor (Polar G1 GPS option 80) or wake, impossible to count the laps automatically (every km, for example) and average FC this time.
So, I decided to returned the watch to Amazon, and let me offer the high-end, Polar RCX5 GPS (270) which stores every X seconds FC and GPS coordinates, which then can analyze the course on the computer (everything is included in the pack, in + ...)