not any more than regular squatting. like i said, took some stress off my upper back when i wasn't holding the bar, but bad form and i could feel it in my lower back instantly.
SSME - dude, we really need to lift together. i want you to teach me to do these things.
MsBeverlyHills - ok, i can deal with the pros and cons you listed.
Perkele and BS - screw both of you with BBF's dick.