Got one of these today, claims to play .mkv files, which it does, from USB. It wont recognise them over the network, which is just slightly annoying.

On top of that, it has Miracast, but neither my Nexus 10 nor my Galaxy S3 wil connect.

The unit cost £29, and i essentially want it to connect a usb drive so i can watch films on an older TV (no network capability), so not that bothered, but a heads up for anyone thinking of attempting this.