Tried the projector for a couple of weeks in a normal living room:
* Beware of "Rainbow Effect" (RBE) on this kind of projectors. The girl did not see anything at all, but it was so disturbing for me that the machine went back
* Very good sharpness - especially in 4K!
* The machine sounds a lot. No harmonic fan noise, since it's the color wheel that sounds the most
* The swear is safe. On plain cloth everything turns gray.
* No lens shift. You must match the height perfectly when fastened to the ceiling
For the money there are much better choices out there.