i used it for a while, and it IS nice, HOWEVER.... modification of this UI is a giant pain in the rear...at best. adjusting this UI in any way is not even remotely user friendly. just a warning that what you see is what you get and getting more is not fun.
LUI 3 is actually not hard to configure at all, I found it to be very user friendly. Im not sure if the above poster was referring to older versions maybe..