I tried it out and it was slower than expected. Wifi is really bad with YouTube buffering constantly, I have other devices and android boxes that work fine so it's not my home network.
To make things worse the Ethernet option won't switch on so the device is nearly useless.
Here are some pics, it doesn't look like the inside of a genuine mk809iv. I think it's a clone or fake. Notice how there is no antenna, the red slider is fake.
What do you think? Any help installing a antenna wire is appreciated.