The ability to create custom workouts and track progress while working out in the field. I like that it has an option to sync to my phone so I can continue training when I'm not at home or in front of my computer. There are some things that I would like to see changed. For example, sometimes there isn't enough space to write down info about exercises. Also, sometimes the workout doesn't load properly. It's easy to use once you get used to it. I am able to train while I'm away from home. This helps me to be consistent with my workouts.