I played the demo, I wasn't impressed. I'm reading there's an error happening that is deleting My Player and Association saves as well.
Like every NBA 2K game, they release a buggy POS and consumers have to wait a few months to get fixes.
I'm waiting for a price drop, and the problems to be fixed.
If you have 2K12, do what I did, go into the 2K Share and download the 2K13 roster update someone made. It should be easy to find, as it has thousands of downloads.
I'm now playing a Pistons association with the entire rookie class, and update contracts, trades and rookies across the league. With that, I can wait until it has a sale for $30 or so.
Personally, I can't recommend buying it at $60 unless you're one of those people who mindlessly hands over their cash for the shiny new toy, disregarding the value of the product itself against its alternatives and substitutions.
Also, I can easily wait as I play Borderlands 2 and Dishonored and XCom release next week.
note: I'm not trying to dump on anyone who did buy 2K13. It's your choice.