For what it's worth, I have the 8Bitdo ultimate for my Steam Deck when it's docked, and I love the thing. It didn't actually work on release and I returned it,

For what it's worth, I have the 8Bitdo ultimate for my Steam Deck when it's docked, and I love the thing. It didn't actually work on release and I returned it, but I heard that 8bitdo and Valve did some work to iron out the kinks and it's pretty much plug-and-play now. It's really nice how the charging dock works, too. Pretty seamless to just pick up and play.