I am constantly tinkering with my user interface to try and squeeze every ounce of my meagre PvP skills out. A while back I tried the YakUI release of add-ons, which are excellent. But to try and improve frame rates I deleted them all. I recently just upgraded my graphics card so went back to re-install YakUI.
I was hugely impressed by the installation and ease of use this time round. After you copy the files across the add-on sort of installs itself. It describes what you must do to scale your resolution and fonts then logs you out.
Then when you log back in it gives you a menu of the extra enhancements you might want to make and also gives you a tour of your new swanky UI with little arrows explaining each part. I think Mythic should give the creator a job as the whole installation was excellent!
I moved my war band grid to the middle of the screen in this screen shot as when I play a healer, I like to see what is happening and the little green bars at the same time. I plan to move guild chat in the right space.