I'd read this thread before, and forgot to come back to it afterwards.
I received my (512GB) Steam Deck in the first week of April, and played it almost daily for the first few weeks. I still play it regularly now, though not daily, as my work has picked up. I love the device! It makes it more appealing to pick up and play games in my Steam backlog, as it's sometimes a bit daunting to think about playing games at the same computer I've just spent the whole day working on. Some games that I want to play are still unsupported by the Deck, but many work fine, so I'm going through those games while Valve works to improve Proton.
The regular software and OS updates are cool/exciting to see. It definitely wasn't a finished/polished device in terms of its software; while it could play some of the games I wanted to play, from the moment I got it, there have been many quality of life improvements, often in response to user feedback, and increased title compatibility as time has gone on. I've decided to stay on the 'stable' update channel instead of 'beta', thus I don't get features and updates as quickly as beta subscribers do. It's definitely a heavy device, but I've been able to game on it for hours at a time. My hands are on the small side, though, and it's a bit of a stretch to reach the left thumb stick for regular use. Instead, the games I'm playing right now support d-pad-based movement, so I use that. On the Deck, I'm currently playing Bloodstained: Ritual of the Night, Ys: Oath in Felghana, Eiyuden Chronicle: Rising, and Vampire Survivors.
Overall, I have no regrets getting the Deck, as it's the most exciting tech/gaming device I've bought in a long time!
