Summary: I run for enjoyment and started doing 1/2 marathons and shorter runs just last year.I've used this many times since I got it in mid Jan. Picks up the satellites quickly, never longer than 1 or 2 minutes which gives me time to loosen up before my run. Great training tool, I can finally tell what the pace I want feels like. Easy navigation and setup. I'm not a huge guy but the wrist band is barely long enough-if you're a larger person you may want to check the fit.
Summary: If you care about accurate speed, this thing is a joke. It must be doing some sort of moving averaging over a wide window, so it takes it forever to catch up with your actual speed. And similarly when you slow down, it takes forever for the speed to drop. So, whatever your sport is, if you're looking for immediate feedback to changes of effort or technique, this thing is useless.