I love the app. Im about 4 weeks in and its great. However, however its working with the heart rate monitor is awful. Most of the time it struggles to get a heart rate or its half of what your actual heart rate is. Might just be me but I can flip over to the Apple heart rate monitor and it gets it. The other annoying thing is if you brush the screen on your watch the wrong way it will reset the workout which is really frustrating.
JReves about Seven: 7 Minute Workout, v4.3.5