Having happily used uTorrent for the Mac for awhile, I was pleased by the update. The tabs look a little scrunched, but that can be easily fixed by a skilled interaction designer. I would prefer to have more control on the face of the client, rather than in the Preferences. But the additional information and its presentation are very cool. The power demand is nil and the progress of a torrent easily visualized. Thanks for a good and useful update. No bugs so far.
My CPU load increases if I have a browser (Camino) and any other major application open (like Word). The combined load requires me to close down at least one application, sometimes two or three before the CPU load goes back down and the fans stop whirling. I'm using a late version Macbook.