My favorite part of trainerwork out has to be sharing workouts with my friends! It's super fun creating new challenges, whether they're just having some girl time or we are doing something together as well!! I also absolutely love how easy it can get you motivated when using tracker features like our goal setting tool (a few taps away!) We have been able use this app since its inception so not much dislike about anything at all really but i would say if there was one thing then maybe adding more ways in which users interact within different categories? For example- instead making us choose between "running" & cardio only by selecting from pre made options - make things easier even though still allowing user choice through tracking tools etc.- Also perhaps including other exercises such as pull ups/ pushups ect could help increase variety too!