Let's be realistic about Xtorrent
Your review neglected to say that the demo (free version) has an absolute wonderful feature that you loose when you buy the app.
Namely, the clock that starts a countdown. Your review said something about a slow down in the program after an hour - and - maybe that's why the clock is there.
I wouldn't know. The program freezes after 2 or 3 min, and at the best 12 min after starting. That's why the clock is such a nifty idea - you can tell to the second when the program concked out. But the programmer must have done his homework and followed whatever guidelines developers use for developing Mac programs - I say this because the Mac force quit application works - like a charm - everytime with Xtorrent.
If I would ask the developer - Dave Watanbe, is that right? - for one more feature to addd to Xtorrent, it would be a hot key link to the force quit to make getting control of your Mac faster.
Beyond any doubt for me this is the most frustrating program I have on my Mac. I'd gladly pay the fee and get the "Pro" version, but I have no guarantee that the Pro version would crash any less frequently. And, with the Pro version, I would miss the best feature in the free v ersion - the countown clock.
Joel in his Schaltraum
PS: Some days I don't even bother stocking up Xtorrent and go to Transmission or Pando or Veoh Player as a torrent client. These two programs are free.