Various icon, toolbar graphic and status icon replacements are available, and creating your own is very simple. µTorrent also has support for localization, and with a language file present, will automatically switch to your system language. If your language isn't available, you can easily add your own, or edit other existing translations to improve them!

The developer puts in a lot of time working on features and making things more user-friendly. Releases only come out when they're ready, with no schedule pressures, so the few bugs that appear are quickly addressed and fixed.

Features of "µTorrent":
• 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 
• Trackerless support (Mainline DHT) 
• Localized to different languages 
• Typical memory use less than 6 MB 
• Incredibly small: about 400 KB

µTorrent 3.0 Release Notes:
• µTorrent Web for zero-conf, secure remote access
• Torrent Ratings
• Drop files to share
• Streaming
• Webseeding fixes
• Portable mode (when run in standalone mode off a removable drive)
• Simplified view

Feature Overview:
UDP trackers are a different protocol for tracker communication that uses significantly less processing power on the tracker end. It's important for us to support this because trackers have limited resources, so this should allow them to support many more users with their current hardware and not crash under the load.
uTP is an alternative communication method for BitTorrent traffic that allows the client to automatically regulate its bandwidth usage to avoid adversely impacting your internet connection. This will allow you or other users on the network to download their torrents without killing your connection without any additional setup required.
The transfer cap settings were added in response to various users who have ISP-mandated caps on how much data they can download/upload in a month. Now you can track your usage in MB (with a handy graph to visualize it) and even configure µTorrent to stop torrenting once the limits are exceeded. Currently, you can configure the time interval, the data cap and whether it should stop based on only download, upload, or both combined.
As a privacy notice, this traffic data is not sent back to us or anyone.

Changes in Version 2.2.1 (build 25249), 2011-05-04:
-  promo

Changes in Version 3.0 (build 25303), 2011-05-18:
- Change: torrents added by apps are now labelled with the apps name
- Fix: transfer cap bug which would always compare to download+upload
- Change: updated spinner animation when adding torrents in apps and loading resume state
- Change: Honor no-buffering properly in hash jobs
- Change: Allow double clicking incomplete files in files tab
- Change: Adding an optional hidden label. Any torrent given the hidden label won't be displayed anywhere but in the label sidebar entries. This includes not showing up in All.
- Fix: fixed issue when creating multifile torrents and starting them where the save directory would be incorrectly set
- Change: Add advanced setting gui.enable_comments to disable sending or receiving comments.
- Change: ratings_enable to gui.enable_ratings.