I did install it but found that the files were taking so long to come down, this is because it is in fact a peer to peer programme so the files are being seeded by other users and not form a central server. This is a fact that sky try to not make blatant, it is only by reading the very fine print that it becomes obvious. I uninstalled it ( a very hard job in its self.
You also have the issue of drm, the films you download can only be watched for I think 30 days then lock, they also cannot be moved to disc for future watching.
All in all I was not happy with, if I wanted my pc to be used as in effect a seed server I would use bit torrent etc, it is also a pain to get rid, slows the pc down, uses your download limit and bandwidth etc (it still works in the background to seed even though the programme is closed.
I would do a little more research before you install it, there are a number of forums on the net that deal with this programme (google them).