Compared with other low price projectors it does pretty well, but doesn't really stand out.The optical keystone doesn't distort the focus like other similarly priced projectors, so bonus there!I connected a Firestick 4K to it and didn't get sound until I set the firestick from "best available" to "stereo".The Brightness difference is barely discernable between this 6500 lumen and my other 5700 lumen projector in a side-by-side comparison. If anything, the other seems brighter.The included projector screen isn't anything noteworthy. Decent resolution. The photos I included are of of rear-projection in a dimly lit room. You really need to max out the keystone to get the projector low enough where it isn't a bright star behind the screen. Digital keystones don't do well and lose focus top and bottom when you you hit the extreme angles. This being optical, it does pretty well.Quietness... It's the same as my other projector. 35db a 6" and 25 at 3'. This is important because it'll be close proximity to you if you are using as a front projector. Rear projector you won't hear the fan. With it set about 4m behind the screen as pictured, and watching the movie from 3 to 4m in front, you can barely hear the internal speaker either, so.... I used a Rockout2 plugged into the USB and headphones which powered it indefinitely and was plenty loud enough to provide decent sound.It's worth noting I purchased this as a lightning deal because on paper it should perform better than my other one. Sub-$100 is where this belongs because it really doesn't outclass other projectors in that category. Had it been full retail, I would have returned it.l or sold it off used. Instead, I'm going to sell off my other one as used. Mainly because this keystone looked better. So win for OKKI took off a star because the brightness doesn't seem as advertised.I took a star off for easy to use because the focus isn't smooth to use, there seems to be sticky spots and to kinda have to back off and try again, especially when I had full keystone and was trying to focus for 100" display.