Recs.
Updated
Specs
Pros
Pro Full-featured
BitTorrent covers basics such as Prioritization, Selective Downloading, DHT, PEX, LPD and Magnet URIs as well as Broadcatching, Sequential downloading and Search. It includes MSE/PE for security. It has graphical and web interfaces. Has UPnP, NAT-PMP, NAT traversal for automatic router configuration. Has UDP tracker and µTP data transfer protocol support. Even covers IPv6, web seeding, Embedded tracker, Super-seeding and proxy servers. And it auto-updates.
Cons
Con Data Leech
Uses way too much background data, while task manager and bittorrent up on the foreground and Bittorrent showing a combined 300kb/s up/download avg on the torrents & TaskManager showed it was actually using an avg of 1000kb/s. There is no way it should be using this amount, and makes one wonder what it's up to.