My 510 works great no problems. I have turn by turn and it lets me know well in advance of the turn coming. Did STP without being dropped and I think that is because I use AT&T (another thread). I have the virtual partner geared toward my current average and not the course so the challenge is always on. Weather is a feature that I use at the beginning of the ride rather than a long it so I can not tell you if it works or not. I am not satisfied that I have got my money out of the 510- I need at least a couple of more years using it and then Ill move on. But for now all is good.
V