I use Azureus and i love it!
Theyre updating the program almost every day [img]i/expressions/face-icon-small-tongue.gif[/img]

But what problems should there be with azureus?
Didn't have any probs here, but if ur getting slow speeds with it, try redirecting port 6881 - 6889 (in ur router) to the pc where u installed it.
That should fix it