Been following MuscleHack for several years, and have always enjoyed the information, so decided to switch over to this app from my previous one. I love how simple it is to use, but there are two flaws in my opinion.
First, the exercise bank is very limited, however it is nice to be able to write my own in. Second, I always have music playing from my phone via Bluetooth while I workout, and upon opening the app, it lowers the volume quite a bit until after I start and complete the rest timer. Once the timer completes its countdown, the volume returns to normal.
Aside from those two issues, I love the app.