Alita is a slick, glossy movie that is impressive until half-way through, when I think it looses sight of itself and becomes a little messy. Losing her heart to a crush (almost literally) becomes the undoing of what was up until then a nicely paced sci-fi-lite romp. Although it's great to have a female character whose power is beating the crap out of people, and not just turning invisible, or doing ninja knitting, or something.
Points deducted for the almost continuous nudity (in tasteful metal) and fantasy costumes-- though without the gigantic boobies of comic books. To be fair, although she's impossibly thin and "Kawaii', she's a decently written character even if she gets a little soppy at times.
But it all gets set up for a sequel, so that's ok then. Just don't expect an ending, you'll have to shell out more dough for that. Trilogy, anyone?
Rating: Three ass kickings out of five.