I checked out the Union Square location last Friday (I work in Union Square and finally got around to heading there). For an additional 10% markdown on everything (games, DVDs, CDs) I would buy a lot of stuff, but currently it's not really worth it compared to Amazon.
Is the rebate deal still in effect? The links still work and the banners are still at the top of those pages, but when I go to check out, there is no indication there are rebates on those games.
I didn't get a chance to get to GameStop during their last B2G1 sale, so I think I'll finally pick up BioShock, Mass Effect, and Orange Box for the 360.
I got Disgaea 2 for $12 and Rogue Galaxy for $10 yesterday.
I wish they had started clearing out Castlevania: Portrait of Ruin and Super Robot Taisen: Original Generation.