Short answer: stick with other programs. Loooooong answer:
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I admit, I used it. It has one problem: the users.
It's truly a community-driven P2P program, and as we've discussed before, most of the internet is inhabited by people who aren't as polite and level-headed as the folks here.
Every single hub has a multitude of rules that you must follow, and they all differ from each other. Further, most of them have population limits, so you either get transferred to a mirror hub or simply disconnected.
Then once you are on, there's any number of things that you can do to get kicked off. Search for a certain number of files within a certain time limit, and you're booted. Accidentally share a few unfinished Kazaa downloads, and you're booted.
And don't think you're simply kicked off and you can just log back on. Most block your IP for a few hours to permenantly.
I tried to be nice and civilized to the people on the hubs I needed (Dragonball Z hubs), but another problem comes with moderators.
The owner of the hub (a person running the DC server software on their PC or web server), will assign moderator status to their more frequent users. This makes people power hungry, which in turn upsets other users, which causes the script kiddies to attack the hub with bots that flood the chat sessions, slowing down the server for everyone. (no, I wasn't one of these people, just one of the affected).
Want more problems with it? Here's some more:
You can find any number of files, but if you are behind a firewall and the other person is behind one too, no dice.
People frequently lie about their connection speed (a suprising number of people have T1 and T3 lines in their houses).
I agree, it's incredibly hard to figure out how to get on a hub. I haven't used the program in months, or I'd remember how to tell you to do it. But once you get on, and find a user, you will wait days for a user's 1 or 2 download slots to open up, and if the program doesn't happen to check for the opening fast enough, another user will latch onto it.
You also have to watch out for what version of the program you're using. If it's DC++, maaaany hubs won't let you in. From what I remember, if gives you many advantages that upset people. It's like cheating with KL++ on the activity rating, except the hubs can detect DC++.
There are other negative points to it, but I've already rambled enough.
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Matt