Sadly didn't have anyone to play co-op with, but was able to play around with it a bit pretending to be two people. I think it has really solid mechanics, and the tutorial's well set up. Usually I get frustrated by tutorials, but this one wasn't bad (probably because it lets you play with the controls while also letting you skip ahead)
If I get a chance to play it again with someone this week I'll pop back in and update my comment!