Serious disadvantage seems to be the picture quality, namely esp. When playing movies. Black and white is not good to look at and in some sequences there are visible abnormal playback. Overall though (containing less than a VGA cable) in a (barely tolerable for me) area, but considering their price I think 3.5 stars for adequately. I actually wanted to vote with three stars, but I must confess that the enumerated advantages of the device but be decisive for the 4 star rating.
While there is currently portable projectors with significantly better image quality, but these have generally not all the above advantages / opportunities and be criticized partly because non-liquid representation of films, esp. If the transfer takes place via USB.
It will be interesting, what does the future hold in this segment ...
ADDENDUM:
Shortly after the warranty no longer picture only flickering. Which entails that the advertised LED life when the unit is otherwise not designed to an adequate service life.
