Well actually I'm delighted, I travel used for viewing movies loaded on a USB drive fat 32 (this format storage longer than an ordinary key) The reader accepts a wrench up to 16 Giga, (I experienced), so 18 long - on average films!
Furthermore nothing prevents you to take several key (eg for holidays) The autonomy of the device allows to watch a whole movie (up to 2 hours). Otherwise I recharge on an external battery equipped with a USB port, eg Hoo too 29 euros on the site, I commented, it is great! or I plug it into the mains. Image and sound very satisfactory (given the ridiculously low price). Hence the 5 stars!