I'm not too fond of Prey. It's just another shooter with a gimmick. The spirit-walking thing could have had some promise... but it is a joke. The only thing it's used for is opening a path so you can continue on. It's the equivilant of Half-Life and having to push around boxes, only to a much more retarded degree. And the ressurection thing is stupid... I mean, if your body is broken you're not going to spring back to life because your spirit killed some other spirits.
The only good points:
Portals
Female genetalia on the walls (I lol'd when I first saw it)
Amputating a giants arm with a force field.
The portal near the beginning that puts you into the display case.
I'd much prefer a portal-puzzle game rather than what Prey is. In truth I am looking forward to Portal, it reminds me of concing in TFC, and that's a blast.