Any experiences with this thing?
There ars dozens of such devices on the market, basically just a tiny Android box. Usually loaded with a skin/launcher called MBOX, will have pre-installed apps like Kodi, which has a large global following but which I've found completely useless.
I've had one for quite some time bits, and recently got a second. If you're into Android aid they're great, but they do not deliver the 'watch thousands of channels for free ' existiere they promise. Best if you load a more standard launcher like Apex and don't bother trying to use Kodi, but use things like the Swisscom TV 2.0 app , Netflix and Showbox (currently offering perhaps the best range of fre TV and movies).
Basically just think of it as an Android phone or tablet that's plugged directly into your TV. You will need a wireless keyboard, add the included controllers generality don't have a mouse/touchpad. Don't bother with with pseudo-brands like the one you linked - they're all pretty much the same and you should look to be spending only 50 francs or so, plus another 10-15 for the keyboard.