[Xiaomi 11 Lite 5G NE] DankDeuxez:
Just flashed the newest PixelOS on my 11 Lite 5G NE a couple of days ago coming from MIUI 12.5.8 (rollback from MIUI 13.05).

And even if I've never really had any experience with other roms, as this was the first time actually flashing a custom rom, I can still say it really brought the phones performance out compared to MIUI 13. Though there are still things that didn't work with PixelOS, some of which are:

* the screen time feature doesn't work all of the time. It just started counting even though I've had this rom installed for a few days.

* The Battery usage graph are either completely off, or sometimes just hours behind the actual time.

* The camera app crashing got a work-around by installing gcam, but it seems like I cant import the custom .xml files with those apks.

* Screen Brightness is all over the place. Either not reacting at all, or going max brightness in a completely dark room. Tried to watch some YouTube last night, when the brightness gradually began going up. Had to turn of auto brightness.

* Battery life is greatly improved over MIUI, but sometimes it still likes to chew through 5-10% of battery while idle. Battery usage works great when you actually use the phone for stuff.

* Gcam EIS doesn't work at all. Enabling it doesn't do anything I terms of stability. Though this might get fixed when the stock camera app works(?).

Other than these minor bugs, its actually a pretty stable and good rom! I had some issues at first when flashing, were it couldn't read the .zip file, but it was fixed by using a custom ADB and Fastboot tool.

EDIT, A few days of usage:

So a few more days have gone past since I first flashed this Rom, and I got a bit more information on how it performs as a daily driver.

The important stuff first: Battery Life.. I previously stated that the battery life was pretty decent with this rom, with a few moments here and there were it would just chew through the battery. Well it seems like its becoming a bit more often than previously. Woke up this morning with 100% battery, went downstairs to eat breakfast and meanwhile watched a few YouTube videos at maybe 1/3 of the screen brightness. After 10-15 mins of watching YouTube, I had roughly 89% left.

Went to lay down in my couch and continued to watch YouTube at roughly the same brightness. After 30 mins of YouTube I somehow still had like 85% left. How come it first chews through 11% in 10-15 mins, and then barely 4% over 30 mins?

The same stuff happens sometimes when listening on Spotify. It can be like 3% over 30 mins OR 10% over 25 mins.

In Short: Battery life is all over the place for me. But its still a pretty decent upgrade from MIUI.

Now to some other stuff: Fluidity, Usability and Stability.

While this rom first seemed to be almost perfect when it came to those 3 things, I've now come across numerous things that drags it down in those aspects. While viewing open apps in the background, it sometimes doesn't work as intended and I instead just get the app I had open, and nothing more. No option to close it, No other background apps visible etc. I had to go back into the app and then swipe up for it to work as it should. Will try and get a screenshot of this happening next time.

And Lastly Stability and Usability.. I've seen previous comments on here stating that the phone would reboot randomly every 1-3 days. And I can confirm that my phone has in fact randomly rebooted while I was using it. However I'm not entirely sure it did actually reboot. I was using when the screen suddenly went black. Took about 1-2 sec before the google logo came up (the usual boot animation). After ~3 sec it booted into Android and I had to unlock my SIM and phone. So did it seriously do a whole reboot of the system in under 6 seconds?

Doubt it actually did, but its still a flaw since it closed every app I had open, and if you for example was writing some important mail or something, it most likely wouldn't be saved and you would need to start over.

NOTE that this has only happened to me ONCE so its not that big of a problem.

Even though I've encountered these stuff I'm still happy with the rom. Its still a great and new experience for me compared to MIUI. I still got some stuff that I miss from MIUI, such as individual-app-volume controls. But its still a work-in-progress rom, so these bugs are not really a surprise, and hopefully it'll become more stable with each update that comes.