The guided workouts need to be updated to allow user input, I'd love to make my own routine using the workouts they have on the database; can't imagine it being that hard. Also, perhaps allow the band to store more than one guided workout? It takes forever sometime to go into the appon the phone just to switch the workout (especially with how shi**y the bluetooth on the Lumia 830 is).
Also, guided workout runs don't utilize gps, and that sucks. I like having intervals in my runs, but without the GPS tracking I can't tell my lap times and such. The running app tracks via GPS but it doesn't allow any intervals (run for 5 minuts, jog for 1 min, etc). I'd love to see them combined.