Z 5 I have an ultra short throw (UST) projector, which is convenient because it saves space. However, the low projection angle also means that any bend or flaw in the screen warps the picture even more noticeably than with a regular projector.I have bought several other screens from Amazon over the years--a pull-down screen, a standing screen with a tripod base, a regular screen that I had to rig up myself with bungie string and laundry poles--and all of them showed wrinkles, waves, or at best a slight curling around the edges that warped the image to a greater or lesser degree.This screen, however, is taut and smooth with no bends or wrinkles to hurt the image. It's also the least expensive and most compact of the screens I've purchased. I am very happy with it. As an added bonus, since it is two-sided with no back panel, it is even possible to do rear projection.I had almost given up looking for a good screen and decided to just project on the wall, even though that made the picture grainy. Thank goodness I tried one more time with this screen. Love it.