Building off what the other guy said, you'll want to upgrade the hard drive when you can, I got the 64gb one and got two 500+ gb sd cards, but the shaders needed for the games can only be stored on the internal memory from what I've seen, and even having a few larger games installed has filled up the majority of my internal storage, to a point where I couldn't download updates for flatpacs or run some games due to so LITTLE storage. I'm going to look into upgrading my drive because it became such a problem for me
If you consider, consider also to buy the one with the lowest storage. It is not that hard to upgrade it yourself. You end up with even more storage than the most expensive model (if you're planning to buy that one). You only miss the anti-glare etched glass and a custom profile background. But you can buy a anti-glare screenprotector if needed.
I've had mine since launch, I've used it less this year since my company cut all travel, but I'd definitely recommend it.
Mainly I use it as a home console, since I don't have another console and it's great having all the Steam library right there. I set up Heroic Games Launcher and play Rocket League quite often.
I'd thought of getting an Xbox before as it's also okay with Game Pass for just playing something on the TV to relax. But it seems that's really going to end up like Netflix with the decreasing quality and increasing price, and paying 500+ EUR to be locked into that doesn't seem great.
Then what really sealed the deal was when I visited my brother and we couldn't watch the World Cup on the Xbox. Like you have some of the best hardware in the world, and can't stream video because they lock it down so much. Whereas the Steam Deck is so versatile.
I actually started thinking about it because I will be traveling for work this summer for the first time since 2019. I don't expect to do much more traveling though, so mostly I would just use it in a more comfortable chair where I use a laptop today or while waiting for my kids at various events.
I play it with my kids. My 7yo and I are bonding over his playthrough of Zelda A link to the past. He gets to do all the exploring and puzzles and I get to beat the hard parts (for now)