I've played about 40 hours so far on a Series X. It froze on loading twice in that time, but otherwise I've had no performance problems. I even tried remote play streaming from my Series X to my PC and it worked well also.

That said, Starfield is fine. It's not great- I don't think it would be considered GotY even if BG3 and TotK hadn't come out this year- but it's otherwise solid. If you like the Bethesda formula, Starfield plays it absolutely straight (for better or worse). The usual critiques of Bethesda games in general apply- it has that look of a Bethesda game, the NPCs have the facial animation range of a post-botox Barbie, Radiant quests abound, the exploration gameplay loop is pretty shallow, etc.

Don't get me wrong- there's a lot it could do better, much of which other games already do. It's a sci-fi fi version of Skyrim, and that's good enough for me, but it probably won't live on in the gaming zeitgeist.