I played a bunch of it tonight with some friends and I think it's pretty neat. I got into games super quick and they were all completely full, which I'm sure has everything to do with the price tag.
The one problem I see thus far is in the way they've handled the microtransactions. They do the whole virtual currency thing, which in this case is happy tickets and I'm not a fan of how they've got it laid out. For one, you're like...two levels of space bucks deep when you're looking at the "price" of items and it's kind of ridiculous on a system where you're already buying everything using funny money to then further mask the actual price of the items. The second problem is that they jump from a small, enticing, impulse purchase of 80msp for a pack of 8 happy tickets to 400msp for 50. Where's the middle ground there? Further creating a problem is the fact that it seems like all of the things you can buy cost way more than 8 tickets, in fact what seems like one of the main transactions (buying card packs that give you two random items and one random premium item) costs 18 tickets, which means if I wanted to buy a single pack of cards I'd need to make 3 separate ticket transactions and then be left with an odd couple tickets, the inconvenience of which is enough to stay my hand. I'm a huge sucker for buying a handful of small shit on a whim, especially on 360 where I've usually got odd points sitting in my account, but they couldn't pull me into one here.