It depends on the exercises you want to do. Most of the people purchasing those are just gonna do curls, and they're fine for that. Bench presses, rows, and flys are okay too. I ran into trouble trying to do presses, because the shape and size makes it impossible to get a good start position. I'll bet that skullcrushers are a problem too, for the same reason. And don't even think about doing cleans with them!