I've had my PX1- Pro for a couple weeks now. Since I had to wait for my screen to arrive and like probably every first time projector owner, I unpacked it and set it up to project on my not perfect walls to see how it works and what it looks like. And it was impressive... I've always had larger screens, but 75" was the max, and to set this up to match the screen size that I was getting even on a wall that was not a perfect color, it looked great..
Since I've never had a projector before, I cannot make effective comparisons to other projectors, However the color is impressive with the 3 laser and the brightness was adequate even with some lighting as my area is not perfectly dark during the day, though that can be improved with better curtains or blackout curtains.
As I noted, the image is very good even with some lighting and since the installation of my Spectra 120" screen that has improved. However like all projectors and in most reviews I've seen, anytime you can make the room dark, the picture and the colors pop even more..
Being my first projector, 2200 lumens does seem like enough, some scenes are quite bright, dark scenes look good, however without more to compare to, its impossible to know how good it really might be. I can perhaps see if it were brighter, I assume it would overcome any ambient light more easily, but my area is dim, even during the day, and I am planning to improve on that.
I have not had any issues with motion that I can complain about.. I've tried the various settings for it and motion handling seems to work fine.
During the setup, I used the projector's automatic geometric calibration and it works great, once you get things lined up as best you can manually, at least in my opinion, the final tweaks can be done in a minute with this feature. There has always been concern in most every setup or review video I've watched, where manual geometric calibration should be avoided as it can degrade the image, I do not believe I am seeing any such issue using the automatic geometric calibration feature. I find this feature very easy to use, step by step, QR code to connect to the projector, take a pic of the calibration screen and upload it, and in a few seconds you screen is perfectly aligned or so close, any final tweak is a breeze.
Overall I am very satisfied with my initial foray into projection and I think UST is the future, since they solve various issues that I think other long throw versions have inherently, however nothing is every perfect and I am sure that future UST's' will make more advances in setup and performance.