Have been using it for about 4 months. I do not game or use a lot of social apps, so here is a mini review, for what its worth.

Very easy to install on a Pixel 7 Disliked the default launcher, Bliss, but it was easy to install alternate launcher. (I installed Kiss, but there are lots of FOSS launchers available) Unable to purchase apps using MicroG, BUT, you can purchase apps on a computer, or other device, then install through the "APP LOUNGE" Audiobook reader and MP3 player work well, as expected. Bluetooh connects to car and other devices as expected. I use Here We Go instead of Google maps. Works well. Default web browser works well. Two different banking apps work well. Default SMS app is very plain, but works well. Signal messenger works as expected. E-mail account @murena.com included, very limited storage with the free tier. Advanced privacy app seems useful. I am only using the block trackers option, which seems to work well. Fake geo-localtion and hide IP accomplished with use of TOR, so slows down internet, but is easily toggled on/off.

Overall, a positive experience for me. Very similar to any Android experience, but with much less invasive ads and less Google.
Things that are important to me work well, and as expected.