A) Counting miles on the trainer is pointless. If you insist on counting something, you should count "effort" either as watts or heart rate, and "time". If you are training for a purpose, record time, watts AND HR.

B) Does the Garmin keep recording if you aren't actually moving? I have a 705 and CinQo on the way.... but it occured to me that I would probably want to keep using my Powertap on the trainer, because the GPS would detect no movement and the 705 would stop recording.

Does anyone have any experience with this? I'd love to use the 705 and the CinQo on the trainer to record power and HR w/o having to use the powertap wheel. It seems so... redundant.