I used it for a long time but switched back to regular Terminal for the lower latency, because I realized I couldn't even name an iTerm2 feature I used that Terminal didn't have. I'd just been using it because it was so widely discussed.
That's completely fair. For me the killer feature is it's multi-pane support. Being able to have several terminal panes side-by-side on screen at once without having to fiddle about with something like tmux is wonderful.
