I received my Q5 last night and was very impressed. The packaging, design, and video performance of the projector exceeded my expectations.
While experimenting with each of the source inputs, I projected a (roughly) 7-foot diagonal picture on a wall that has 2 75-watt sconces which were lit at full brightness. The images were easy to see and the built-in Office files viewer was (mostly) perfect. I also sent video from my iPad and used a USB drive to load up various MP4 files with no problems.
The only disappointment was the speakers- I can barely get any volume out of them and they were easily outdone by the iPad's own built-in speakers.
Overall I am quite happy, I do hope for a long life from the projector.