* Multiple simultaneous downloads
* Smart bandwidth usage
* File level priorities
* Configurable bandwidth scheduling
* Global and per-torrent speed limiting
* Quickly resumes interrupted transfers
* UPnP support (WinXP only)
* Supports popular protocol extensions
* Localized to different languages
* Typical memory use less than 6 MB
* Incredibly small: 98 KB
Has many more features than that of course, including a full weekly scheduler (for those that have limits imposed during peak hours etc) which I have never seen before.
Their claim of typical memory usage will obviously differ dependant on how many torrents are active, but for example Bit Comet is using 80MB + with only twelve tasks so I expect it to be significantly lighter.
Will switch over permanently once my downloads are finished, then will (hopefully) be able to seed the rest to my standard 110% with µT.