This torrent program has the advantage of limiting the upload speed. Ctorrent needed this functionality for me to consider it. I use this program in conjunction with the screen program. That way I can have multiple downloads running on multiple "screens". I can detach myself from a screen, logout, log back in and check on my download using screen -R. This program uses quite a bit of memory. I usually don't have more than 2 things downloading simultaneously because more than that will make the bittorrent client crash with memory errors and your download will stop.
I use the following commands:
from here you can use control + D (or control a + d) to detach the screen. You could then completely log out and have your torrent remain downloading. then log in and type screen -R to reattach the screen. You will see your torrent still going. You can look up more of the wonders of using screen online.