We had one in an auditorium where I work. Only problem is it was underneath an MRI scanner. Every time they’d open the door to the MRI, the magnetic field would knock the projector tubes out of alignment.

The technician who came out to work on it said it was hopeless. He told us he had a customer whose projector would get out of alignment if he moved a speaker in the room.

I was so happy when we finally replaced it with an LCD projector.