After testing a very long list of fitness apps, I believe this one is the best around. Exercises and programs are very complete and balanced. The app is quick and user friendly also on the small iphone screen (looking forward to an ipad version!). Tracking workouts and training sessions is super-easy. Almost perfect: I would only add % fat in body measurements (and possibly some user custom fields) and expand it to fully cover cardio training (with HR belt and GPS support). Great app, go for it!
Andrea Busnelli about FitnessBuilder, v4.1