I have been following the release thread for months, and the wait was TOTALLY worth it!
I agree with Filarun, all my addons from before made my FPS ssssllllllooooooowwwww - MazzleUI has allowed me to actually enjoy going to the major cities!
Clean, efficient, easy to see my screen, and even rearranging/adding the buttons was a snap! (Bongos = easier to use than Trinity).
My favorite thing about the UI is the help menu - it explains so much without having to head to the forums in the middle of the game if I need to tweak something just a little bit!
Thank you so much - awesome AWESOME work!