I've only just received this, but I'm blown away by what you actually get for 100 bucks. I got this for a kids movie night, so this is perfect for occasional use. Good for night time, but not bright enough with daylight.
I was able to compare this with a LG ultra short throw projector that retails for $800. I can get about a 4m wide projection from about 5m back on this. On the LG I only needed to be half a meter away. LG is definitely clearer and brighter, but you just can't justify the extra 700 dollars.
If you have enough room for the projection, then you can't beat this for value. Only annoying thing is the lack of horizontal Keystone, it only has vertical Keystone, so projector needs to be spot on in the centre.