Top image quality (film&bureautics), check that the positioning is right for you
I'm projecting onto a wallpapered wall that's neither perfectly white nor perfectly smooth and yet I think it looks great!
I also project in the middle of the day, with daylight at my back, and the default brightness (50%) is more than enough for me.
I also get very good sharpness and I can project my PC screen to do whatever I want (office work, reading, internet, prog, etc.).
Two comments though:
? this projector sits more or less between you and the projection surface. I've tried to move it to the side of the room, but as it's a short-throw projector, you can't put it too far away (or you'll get a huge image!) and that reduces its "bias" use.
? the video projector can be tilted a little (e.g. to project higher), but as soon as you tilt it too much, you lose a bit of sharpness at the top or bottom: this isn't at all annoying for films/videos, but it can be if you want to do office work, because you want the screen to be sharp everywhere so you can read.
(I tried playing around with the keystone settings and all that: without success, well, I'm no expert at adjusting things either, but I tried!)
The moral of the story is that if the positioning suits you, this projector is great.