I had read the Forerunner 10 and wanted but then a few more features, including a heart rate monitor or doing. The best thing about the clock, I think the function of training plans that can be put together yourself at home and invite you at the clock .... I've now more pleased to interval training on the track. And since you can really his imagination run wild as you want make the interval .... if you go to the heart rate, distance, speed or time that may also have many other watches .... but I could not test In the beginning it took me a little disturbed that one during the running session is not the current Mean. angeziegt gets, because you could in the Forerunner 10 .... you get only the current Speed. or pace seen Durschschnittsgeschw. appears in the evaluation of a course only at the end The 2 data pages, each with 3 freely configurable data fields are in my opinion very well managed by well, the hold on the wrist is also good, because the clock is also not overly large or bulky. The chest strap is top ... no slippage. Sometimes it takes a bit until the GPS receiver made, but that also varies ...