I'm on year 2 of the game, and rarely notice bugs. There's this arena boss fight you can do, my wife died and teleported outside the area, but her crossbow shots traveled infinitely and could still damage the same boss I was stuck in the arena with. Random stuff like that, certainly nothing game breaking, no crashes or anything.

Compared to Stardew Valley, it's much more heavy on quests. SV has some basics, but it's pretty much just build the community center, upgrade your house, get married, etc. It's also much heavier on skill progression. You'll eventually use magic for nearly everything if you (mining, tree harvesting, watering, fishing, etc.).

Sun Haven also has 3 different towns, all roughly the size of Stardew Valley (the main town is bigger though).

Which leads me into my only real complaint. You will have a farm in all 3 towns, with their own houses, crops, barn animals, and quests. If you play alone, it's kind of a lot to manage. It's just my wife and I that play, but if I played on my own, I would probably only focus on one town at a time, which feels weird. I'd rather the game introduce something like a familiar that can slowly take care of things while I'm gone doing other stuff.