$570 buys a lot of training days in a boxing gym,holy shit, $570 for that piece of crap.
Heavy bag isn't designed for accuracy, its designed for power. If you want accuracy use mitts and sparring. It's easy to be accurate against a stand still target.because it helps you to be more accurate and use correct form..this kind of forces you to aim your punches and kicks where a heavy bag is like kicking a giant loaf of bread on a chain
I think it looks good and it really isn't that expensive unless you are broke as fuck. Some people don't have time to go to a gym and they just want to hit shit not to mention some people also don't have a place to hang a heavy bag.