@thomasescritt just be prepped for playing in lower resolution or lower frame rates (or both) for the newer or more demanding titles when using a monitor or telly. The resolution gets away with being lower handheld much more than on a big screen, but that's mostly noticeable with big new titles like Elden Ring. Battery life will also be lower for demanding titles. Older stuff does better. Do check proton.db for your key titles though, since coverage is spotty.
I like mine well enough, though.
Elden Ring, for instance, you get lower resolution, and the frame rate can dip a bit at times. Not as bad when running handheld, but can be jarring on a bigger screen. Though you have a side menu (button with the '•••' on it) on the deck where you can tell it to smooth things out a bit (scaling filter) which helps, but only so much you can do.
Bit of fiddling often necessary with in-game and Steam menu's, but you can get it working. Download others control presets for PC games.