Stephenie Meyer still writes from the point of view of a young woman, but she does so much better than in Twilight. I think the reason for this is that Wanderer has to adjust to being a young woman, rather than just wallowing around in it. In this way, we get to examine human emotion and all its irrationalities. We also get to see some much more nuanced character interaction. For example: While Wanderer does get a separate love interest, it develops organically, rather than instantly.
I'd call it fantasy, rather than Sci-fi, because anything remotely scientific is never explored in detail. Sure, there are aliens, other planets, and advanced medicine, but they're treated more like supernatural entities, other worlds, and magic.
Helpfully, it's not too light on action or suspense, which I actually think Stehpenie Meyer is pretty good at. (but to be fair, I don't recall if it had Twilight-style punctuation abuse).
Overall, it's not a bad read.