I can finally keep my email always open (on the left-hand side monitor), put IM communicator, desktop widgets and other trivia stuff to the right-hand side one and be focused on my main task. I had to precisely choose the side displays for my setup, so they match the resolution, physical dimensions (at least visible screen height) and color quality of the center one, which I already had.
I use two NECs at work, so having 3 monitors should be better, right? It is. I don’t have the small gap in front of me, just a wide 24″, 1920×1200 area waiting for me to do something.