I've seen it. A poor man's version of "Last House on the Left". A couple of fairly graphic ultra-violence scenes (and who doesn't love those), but the horrible acting and rapid ending (did they run out of money?) made it not worth anyone's time.
From watching the behind the scenes extras, It's director, Dave DeFalco, is some steroid freak bodybuilder, wrestler, who apparently really wishes he was Rob Zombie.
And Ebert apparently hated this film because of the violence disguised as a cautionary tale. Ebert's a complete wuss on that subject, but that still didn't make this a good film.
Forgot to note that Sage Stallone is in this, and apparently does not like his father's work out routines at all.