[livueta]

I've been a happy Transmission user for a while now.

  - nice variety of clients/platforms

  - webui isn't completely terrible

  - works well in daemon mode

  - haven't encountered perf issues seeding 2k+ torrents/~5TB data

  - supports modern features (DHT, PEX, magnets)

[Mister_X]

Yes, Transmission is the most stable client I've ever used (Win or Linux), but like so may others, don't run out of disk space, or you're in for a major hassle rebuilding your index.

[ksec]

Only problem is Transmission uses its own core, and as a whole, core + UI it doesn't seems to be getting anymore development.

Which libtorrent just had its 1.2 released that has lots of changes.