I've only been committed to a UT daily driver for a couple of weeks but I'm not looking back. Running a Pixel 3a XL.
On T-Mobile and coverage for my area is good.
Mobile data is good and Hotspot works well.
GPS navigation is working great.
Use telegram mostly but SMS is good and MMS is working.
Calls are fine, phone connection and call-through vehicle work great.
Even Spotify (Futify) is working well.
The E-Book reader is awesome and pdf's read well.
Asteroids and Pacman, I'm covered.
The only other things I would use if remedied are speakerphone calls and calls with headphone mic's, be they wired or Bluetooth. But even without these, I'm 100% on UT.
I am ready to pull the plug on my Verizon phone, I don't pack it anymore, but I'm going to wait and see how the T-Mobile network changes affect coverage in my area come January. If all goes well I will be setting up phones for the rest of the family to move them off Android after that.