I actually got this movie on DVD as a Christmas present, and although I have to say that it has some of the worst acting, directing, and writing of all time, it was really enjoyable - in a jumbled, visceral sort of way.
One of the monologues given by the protagonists early on gives the overall tone of the movie:
"The world is full of puke and (bleep). And now a horde of tin-masked (bleep)s are puking in our faces, filled with (bleep)."
The first half of this picture is really miserable and pointless - just a bunch of gratuitous murders and dismemberments. Things only begin to get interesting when ninjas show up.
That's right, Ninjas.
From that point on you get to see some of the slowest Kung Fu ever seen, and the smallest rocket launcher explosions ever dedicated to film. Yeah, I'm really downplaying this - but if you're into B-movies...
This is the cream of the crop.