Had it and have played on and off since the 9/1. My thoughts:
This game is polarizing because I feel people fall into two camps: people that want to play the latest and greatest BGS game, and people who expected Fallout Citizen or No Man's Skyrim. The game can be very immersion breaking if you test the boundaries. You can watch a video of people discharging weapons in a city, and none of the NPCs bat an eye. It turns out that you can fly to Pluto, but it's not there. Landing on planets gives you a mostly flat rocky surface to explore with some mineral nodes you can mine, and no real incentive to do either. Some of the NPCs look like garbage and give you the bug eye look.
My own experience has been mostly smooth on a 7900x paired with a 6950XT on a 1440p UW monitor with mostly high/ultra settings. I'm not hitting high frames here, but the experience isn't jarring or laggy either. AMD's Radeon software pegs me at mid 40's for FPS on average. I think the game looks nice overall, but some of the character models are still not quite as expressive like they are in BG3, even less-so for unimportant NPCs.
Whichever reviewer says they don't have a lot in the way of bugs must either be lying or incredibly lucky. Here's my collection of bugs:
1) Out the gate there was a weird shadowy mirror image effect around most objects due to FSR 2. So I turned that off pretty quickly, and it went away.
2) Sometimes my companion will "forget" to wear their space suit when going from an indoor area to an area that requires one. It's kinda funny to see your companion fighting alongside you on the surface of the moon in naught but a leather jacket and leggings.
3) I saw a corpse (one that was already dead when I arrived) fly around erratically like it was getting kicked around by an angry spirit.
4) Crash to desktop. To be fair, it's only happened on my second play session on 9/2. But that day it happened over and over again that day, but not once since. Basically I'd be playing the game one minute, and then BAM, I'm staring at my desktop. One time the game visibly froze. After I updated my graphics card driver, it gave me a BSOD. I then updated my BIOS and enabled XMP on my ram (to get to DDR5 6000), and was good ever since.
I don't know if the BIOS and and XMP thing made a difference; all the crashes happened on Luna, and I haven't returned there since. But while it was happening, it was making the game almost unplayable. At any second, and with no warning, I could lose my progress. If you search the Starfield subreddit, you can see I'm not the only guy that had (or maybe has) this issue. My rig, while new, has never had any freezes or crashes with anything else I've done with it (it's only been a month though).
While I wish I could leave out my space exploration fantasy more, it seems like that runs counter to what the game is best at. I've heard from several reviewers that you should engage with the main plotline. I'm having fun however, and I'm going to keep playing.
I am VERY excited for the expansions/mods for this game.