http://app.strava.com/rides/7489469
First half of this morning's ride. Fully charged extended battery on HTC Incredible using Endomondo Pro, saved as a .tcx file an uploaded to Strava. Battery was at 92% at the end of this ride.
My 500 used to lose satellited under a canopy of trees or a tunnel. My phone does not.
The argument against using phones as GPS or HRM is myth if you do it right, and it doesn't take much.