For the rest, if not to deliver video, either streaming or read from a video file in the phone, it works reasonably well, the frame rate slightly less annoying low such diffusion EZCast. The range of the device is about 3 or 4 meters with my phone, so for use in the living of ordinary people (so no pieces of 20 meters long) it should spend correctly. By cons no matter the quality of the original video, it seems that the re-encoding to send to the dongle do suffer quite well the video quality ...
Last complaint against him, if you have a USB port to power the television devoid machine, consider buying a USB extension cable (male-female) of a consistent length because the device does not work without the cable supplied with , which both Wi-Fi antenna and USB power, and it is VERY short! And I imagine that quite on some TV models where the USB port even incorporated, is not located close enough to the harbor or (s) HDMI, it may cause problems too. Better safe then.
Not yet able to test with my laptop, but the result is rather average in the end, but good considering the price, should not expect miracles either. The commissioning is not unduly onerous either (I have not found anyway ...)