I had a 4x5 version and loved it. Actually, 2 of them.
However, I will echo about that wire under tension. IIRC it has something to do with the counter-balance. Mine came off and whipped around. Luckily it missed my head, but it would have ripped serious gashes, even if it might not have killed. It was the scariest and most dangerous thing to ever happen to me in the dark room by far. If it got your throat, I'd believe that it could kill you.
Cheers, Richard