Not on steam deck but I play it on Linux pc and ps5. One of the coolest things about it is cross save, you can save your game on pc or ps5 then continue from that same spot on the other platform.
Some things are a bit small and apart from cutscene camera angles or really zoomed in there isn't much detail visible on the characters. I played with kb/m inputs mapped to have better utilization of deck controls. Some low fps bits here and there but generally great.
Played entirely on the Deck. Around release it was a hot mess. Loads better now, although I did experience two crashes at the very end cutscene of the game and had to replay the final battle multiple times. For the most part it was totally fine.