One of the cool things about Slumber Party Massacre is that it was both written and directed by women (not the same woman, though). The uncool thing about this is that I couldn't detect a woman's influence hardly anywhere in this movie, with the exception of one scene. I mean, in the first few minutes there is a tit shot as Trish changes her clothes in her room, and then not too long after that, there is a bevy of teenage flesh on display when the girls take showers after playing basketball. Like, of course there's a shower scene. The director even lingers on a shot of one girl's flat ass for a really unnecessary amount of time. And there are more boobs to come later in the movie. Feminist? I don't think so.
So to end this somewhat incoherent and non-flowy review of Slumber Party Massacre, I'll say that I liked the movie. It's got some characters that aren't too annoying (for the most part), a pretty good body count, and it was created by two chicks. A nice, nostalgic look at 80s slashers, and there are better ones out there, but this one is mostly a good time and deserves its place in the cult favorites section of the horror genre - but still not really a "classic."