It is GREAT in 'regular 3D' unless you are spoiled by regular IMAX visits in 3d then you will not be disappointed.
The advice to go early for good seating is important. If it's like here, the theater is full all but the very back and front 30 minutes before the show. In my second viewing, I got stuck at the back and found the 3D still works great but there was the illusion that things are leaving your field of vision too quickly because you are further back and the screen is relatively smaller. Your eyes want to follow things further to the side but they are already gone. I say illusion because timing wise, it's really the same thing, it just seems like stuff is lost from sight quicker.
