This film has a slow start and is kind of dull in places, but when it starts going... it really starts going. Man is this movie crazy weird (and fun). The third act in particular is nuts. Starting with a headless body feeling up a naked woman (and then a decapitated head licking said woman's body)... it just gets weird--and not necessarily in a bad way. The movie isn't light on its blood and gore, either.
There are other elements, however, that make this not much different from the films we make fun of (in a Troll 2 sense). A particular scene where a character turns on a flashlight and looks around a room with its light on comes to mind. Other character actions are illogical, too (like the dean's insane reaction to Dan's statement about the reanimation serum existing). Granted, they aren't as widespread as the aforementioned best worst movie, but they pop up here and there. Again, not to say that's a bad thing. Just an element I wasn't exactly expecting. Makes for a wacky time. It doesn't help that Bruce Abbott kinda looks like the dude who plays the dad in Troll 2, but scrawnier.
Speaking of the actors, I have to appreciate Jeffrey Combs. I used to be a big fan of the show The 4400... in which he played a crazy doctor with a controversial serum. I know, big stretch (if I ever make a mad scientist movie, I'd so cast this dude). But he plays the character of Herbert West here with a restrained glee. He so straight-faced the entire time, but you can still tell he's having fun with it in his line delivery. And David Gale as Dr. Carl Hill was especially creepy and fun.
The only other thing to mention is the makeup, which is pretty dang good. And I liked the different techniques they used to hide a particular actor's body when he had to act as a decapitated head. There's the Alien/Ash technique where they just had it on a table and hid the opening underneath. But then there were particularly clever moments where they held the head in front of a bulky body, so that the actor could just be on the other side of the body poking his head through. Smart, practical stuff. Today they'd just use CGI or something. This way gives it some charm.
On the whole, I'd say the bits of wacky comedy and the insanity of the second half of the movie (particularly the third act) are what make this movie worth it. I wasn't so sure coming into this, as I felt the first half was kind of slow and dull. And while it doesn't reach Dead Alive levels of crazy awesome (a film I can easily compare this to), it does get rather insane and bloody in its own right. So if you're a fan of this type of flick and haven't seen this yet, I'd say give it a shot. It's fun.