I've recently started dual-boxing, and since I've found this site and MultiBox, I've been loving it.

I originally started because I wanted to level both my 60's in TBC together so I wouldn't do the same quests over and over. I was struggling a lot and doubting my decision when I was trying to control both characters using separate keyboards/gamepads/mice. I'm working with a demon specced warlock and a BM specced hunter, simply because they are my two highest characters. The warlock is my main and the hunter follows. Controlling both pets could be a chore and half the time I'd end up with the hunter and his pet sitting there while I dealt with adds on my warlock. But the difficulty disappeared when I got MultiBox setup and got used to using it.

It's only been a couple days, and I'm still working out some kinks, but macros and keybroadcasting have made things SO much easier. Now I can easily deal with multiple targets and continuous spell casting on both characters. Having the two beefed up pets makes my little party almost seem like a full group.I typically have a VW or Felguard tanking, the hunter's ravager set up for DPS, the hunter also DPSing and my lock DoTing, DPSing and healing the tank if necessary. And so far, healing is a rarity because that much DPS drops things fast. I need to get more practice handling multiple mobs, but that will come with time.