I haven't seen a thread dedicated to reviews so i thought about making one.
So far i've only seen RPGFan's review which in my opinion sounds like a very honest one (judging from impressions i've seen on the internet)
Official Playstation Magazine (UK) review score:9/10
RPGFan Import Review - Final Fantasy XIII score:85%
Nowgamer Import Review score:7.9/10
GameFAQs User Reviews
Gamasutra FFXIII analysis(minor spoilers)
GameInformer review score:9.25
PSM3 review score:70%
Playstation Official Magazine UK review score:90%
GamesMaster review score:81%
If you know of any other reviews feel free to post them here and i'll add them in the OP.