I have used it for sky movies and sky sports no problem. I haven't checked out channels like sky Atlantic, so not sure what that's like. I also use a relatives skygo, so I haven't bothered with kodi (aka xbmc). I am on the minimum TV package with Virgin which effectively costs me £5 a month...
I use kodi on my laptop but I am going to buy a dedicated box for it shortly. I HDMI the laptop to the 50" TV and sorted. Worth a look, get all of sky etc.