I've been playing it, yes. I've run into a handful of bugs, but nothing game-breaking.
And Dan has actually been diligent in fixing any issues reported to him so far. He's released a fairly substantive patch at least once a week (with follow-up hot-fixes as necessary) since he started working on the game again.
I'll be honest, it's been a pretty fun ride these past couple weeks. Being able to play SD2 as an increasingly bug-free experience, and seeing Dan engaged and enthusiastic again, has been a joy. I have no idea what brought about his change in attitude, or what brought him back to the game, but it's nice to see either way.