I've cooked probably 10 pork butts that way. Like you say, it's pretty good for being so quick. The pork shreds well and is pretty tender – you mainly just miss out on the smoky flavor and bark.

I recently got an old Traeger smoker, and I've done one pork butt, and two picnic roasts on it so far. They're definitely in a different league, but it does take much longer.

Since I happened to take a mid-cook photo of the last one I did: https://imgur.com/a/FYyFJ83