Yeah, pretty much no bugs for me either. I've had a few crashes (I'd say 3 or 4 in 60 hours of gameplay, all shortly after launching the game) and twice had a situation where quests won't trigger, with the npc just standing there. In those instances a quick save and load fixed the issue. And that's about it. That said, I don't touch Ubisoft games until months after release as the lazy bastards don't beta test their games properly (if at all) and more often than not they're a mess for some time after launch, at least on PC.
I'm pretty sure that the Ostara Festival bugs have been patched out now.