For HD Ready, the maximum size is reached at 3 mx 1.50, otherwise the image quality suffers too much. The but at a relatively short distance to the screen (5m). Thus the entire viewing area is covered and has already good cinema feeling. The input source should also be carried over HDMI and deliver good quality, otherwise the image reproduction suffer too much. Laptop or PC through HDMI funktionierteinwandfrei, videos such as Youtube running in good quality, but the writing of any website is very hard to read and is indistinct. You should also invest in a good stable Projector mount because of Epson to adjust very fine is what etc. As for the sharpness and nervous wobbly mounts this real. A good device with a large advantage in terms of warranty of the lamp at Epson devices.