The Garmin Forerunner 310XT is now my 3rd Forerunner. I started with the 305, and then switch to the 405. The new 310XT finally now connects these two worlds. It is significantly smaller than the 305 and has thereby all (my) heart needs athletes. The 4 data fields per screen allow you to overlook all the necessary data even when interval training on a screen. The satellite lock takes place usual fast and is very accurate. The menu is clear and the selection of display data is enormous. And the best is certainly that you have to carry around any extra-sensor. All in all, the best thing that Garmin has launched as a training tool for runners and multiple athletes on the market. In my view, therefore, full 5 points!