I have been using utorrent to download movies for a long time, even before Utorrent were bought out by BitTorrent Inc.
And i was beta testing utorrent before they released the final version, the only other bittorrent client that is good is Transmission
for Linux (and i think Mac). I used it on ubuntu 9.04.
But utorrent is simply the best, very easy to configure and light to use, since it does not consume much of resources.