I used it while I was learning how to do Power 90 and it would show that my workout was only 1 minute even though I had made it all the way through. This morning when I actually went to workout for real the watch app crashed and I lost my readings for the workout, but it had the correct workout time on my iPhone. Combine this with the Apple watch losing HR when doing sculpt or any weights and you have a messy situation.
suninmoon about BODi Fitness & Workout Planner, v2.0.1