Are these things hard to use and configure?
I was looking at one like this for sale: http://www.adverts.ie/media-players/m8s-android-tv-box/9080504
If I bought it, what next? Does it come with all the software I need installed?
Are the channels like Sky Movies and Sports a bit like watching a live stream on the internet?
Can Sky scramble their signal and make these boxes useless?
Sorry for the novice questions.
That one in your link comes fully loaded but I prefer to wipe it clean and load my own stuff, all pretty easy and plenty of YouTube videos to help.
Streams and links come and go an some are better than others, the trick is to have a few sources to pick from so if one does go down you will have another to watch.
The quality ranges from poor unwatchable streams to HD quality and everything in between. Its all about knowing where to look for the right stream and once again Google/YouTube is your friend.
It sounds complicated but it really isn't once you have it set up.
That link Smoking Joe posted looks like it has everything anyone would want from an android box, install that and you should be good to go or if you buy that one then just play around with it for a bit until you get used to it and learn how to install stuff yourself.