Only just got my Deck. Still in the process of doing upgrades and mods. But while I have been testing my overclock and cooling mods and whatnot, I have put a few hours into Elden Ring and it's awesome on the Deck. The load times are insanely fast compared to my actual high-end gaming laptop. Looking forward to starting a new save on the Deck, after I have everything setup the way I want it. Waiting on a 2tb ssd to replace the 1tb that I just put in the a few days ago. Need to get that swap done before I can finish the cooling mod.
I've also put a couple of hours into the Demon Slayer game while testing. That game runs at a locked 60 fps, and plays amazingly.