So how do you like it all-in-all?
Personally, I like it a lot. Since it only has a single USB Type-C which also works as the power-plugin, I have a USB hub where I can plug in power, two USBs, and HDMI for an external screen. And when I switch the console over to desktop mode, it's just a Linux computer, which can play most games I like without any big issue. Not saying there are no issues, but in most cases they're minor (for instance Assassins Creed, works, but confusing controller setup). I'm just surprised how well it works.
I'm at this moment posting this from Firefox on it. I do my shopping, banking, media, all of it.
These games I have played or tried: Halo, No Man's Sky, Elite Odyssey, Tiny Tina's Wonderlands, Satisfactory, Stationeers, Raft, Mass Effect, Lego Starwars, X4, and some other games. Half of those games I only tried to start and played for a few minutes to check, the other half I have played intensely past months.
Besides that, I installed Unity3D, Mono, C#/.net, C/C++, Rust, Code, Godot, and other apps or tools.
When it comes to the hardware, amazing tech. I like the joysticks more on SteamDeck than Switch. They're a bit bigger. It's a sturdy, solid piece of machinery. The only thing is to pay attention to the battery. Turn off wifi and such if you don't need it. There are options to optimize battery during game play. Resolution on the built-in screen is --I think-- same as Switch. On external monitor I get 1920x1080, and play most games in that resolution. And since they have connected with iFixIt.com, I'm not worried if something breaks. They thought about repair and such.
So for me, I give it a 10/10, but that's for me, and I don't think it works as great for everyone. Someone asked me if they could use it for their office, and I'm not sure I'd recommend that. Installing office software like Word etc, might not be what it's best for.