I had bad GPS tracking on Sunday after updating to 1.7.15. Leikr had been on charge overnight, and got a GPS fix. I waited outdoors for a minute or two for the pace indicator to drop (whilst stationary) to about 30 min/mile.
With Galaxy S3:http://www.endomondo.com/workouts/262706671/1912653
9.08 mile (as expected from planning the route)
11.86 miles (30% over-estimate)
Almost all of the route was near-open fields, but there is some clear instability on the leikr track, if anything getting worse through the run. Around mile 10 is a small area of woodland between some houses, and the signal is near enough lost completely.