I just picked up MLB 2K13 last night myself and if I wasn't already an NBA 2K13 owner I'd have bought the package deal but alas I am so I now paid $120 for two games I could've had for $80. On the plus side, NBA 2K13 has rescued me from my enuis with the NHL series.
The funniest part was I wasn't even planning on going to pick up a game. I'd actually just gone out for some tea only to discover a transport blocking my entry to Timmy's. I didn't want to waste the trip so I went across the street to Walmart and voila, MLB 2K13. When I got out the transport was gone and I got my tea as well. #winning
I will point out that the career mode on MLB seems to be super lame unless you are a pitcher, which is disappointing.