The embargo on reviews for Assassin's Creed Unity is over, so evaluations of the stealth/action sequel are now online, as is a related Consumerist editorial on "3 Reasons Why Video Game Review Embargoes Are Particularly Anti-Consumer." Metacritic currently lists a grand total of zero official reviews for the Windows edition because consoles, so you'll have to look to the PlayStation 4 Reviews (currently an 81 metascore) and Xbox One Reviews (currently a 76 metascore) for answers at this time. Both the console and PC editions of the game have very low user scores, as it seems to suffer performance issues on all platforms, and there are a bunch of threads about this in the Steam forums and the Assassin's Creed forums. We also see word on a day one patch which may impact this, but the only patch notes we've been able to find are in German.