Note: This post has been heavily edited by a mod (Belisarius), so don't hold Shizuka responsible for any unpleasant content.
Metacritic: 65/100 (based on 5 critics)
Game Rankings: 70% (based on 7 reviews)
Siliconera Playtest: Not a review per se, but it will give you an idea of how the game plays, and should be pretty much spoiler-free.
PlayStation Blog: Also not strictly a review, it does have some concept art, an explains some of the game's concepts.
Gaming Bus: B+
Original Gamer: 8/10
Review Fix: No score, but generally positive.
The O-Network Online: No score, but generally positive.
Reverse Thieves: Details the content of the Limited Edition and the Fate/The Fact booklet.
The Mog Blog: 3.75/5
Paste Magazine: 4.8/10
Ultima-i: Not a review per se, but details the Limited Edition (as compared to the Japanese Limited Edition) and has lots of pictures—both of the LE and of gameplay.
Just Push Start: 3/5
Visual Novel Brazil: No grades, but average review.
Game Vortex: 93%
Updated as more reviews/articles come in.