Interesting concept, but just looking at the track ratings of tracks that I know, it's all over the shop. Easy tracks are rated hard, medium tracks very difficult, or even hard tracks easy.. there's just no standard here.
Lots of areas are missing good tracks, but then I guess the idea is that will grow as more come on board.
I think unless you go and drive these yourself and you control the quality, then this app is a mud map at best.
Anyway just my feedback. Cheers.