I love the Deck and Controller, just a heads up that the Deck "feels" slightly different from the Steam Controller. I've had a hard time adjusting to the trackpad on Deck and still haven't quite gotten it figured out. It may just be a practice thing. Basically the way I'd describe it is it's like the rotation setting for the Steam Controller is never quite right and the slightly smaller trackpad and different positioning maybe affects whatever muscle memory I'm trying to use or something.
As an example, I made the top community config for Monster Hunter Rise, but on Steam Deck it just isn't quite the same and I needed to pretty heavily adjust the settings for the mouse input, even still I can't quite get it right.
However that said, it doesn't actually matter too much, the Steam Deck overall is awesome and I'd take it any day of the week. Luckily, Bluetooth w/ the Steam Controller feels exactly the same as it did on PC w/ dongle and it's sooo nice.