Currently running exactly that. Only ever had minor problems with closing certain resource intensive apps (sometimes they hover on screen when switching between apps) although very rarely.

Otherwise, couldn't be happier.

Installing was just following the website instructions: press to unlock bootloader -> press to flash image -> press to lock bootloader.

Simple as.

I have a Pixel 6 Pro. Different phone, but same generation and same SoC so the experience should probably large be the same. I had zero problems installing GrapheneOS. The web installer was much easier to use than recoveries like TWRP. Performance is really good, fast and smooth. Can't tell the difference between GOS and stock. Hope that answers your questions.

I'm still using it on a 4a, and performance is excellent.

I'm running exactly that, with zero issues. I also have a secondary profile with Google Services Framework on it for the 2 apps I use that absolutely require it. It works great. Seriously, I'm never going back to a stock Android phone after this.

P6 here. No mobile pay. That's the literal only flaw. I couldn't be happier, its exactly what I expected and a little more.

Installation went smooth like butter, the experience isn't any different than normal android and it also runs we'll proprietary apps, but I wouldn't run the on your owner profile