I started using the Compex Sport Elite Stimulator 2 weeks ago in the middle of my training build up for Kona. Since I've started using Compex, my legs recover quicker from hard workouts and I can train harder knowing that I'll bounce back quicker for the next day's workouts. The Compex Elite is super user friendly, and it's compact so I can take it with me when I travel to training camps and races. Thank you Compex!