There are built in levels both front and rear. All movements are smooth, sold and precise. In five years of pretty demanding use I have never had a problem. All movements can be locked with nicely designed and easy to use round knobs that have never stuck. It comes with flat and recessed lens boards.
Longer bellows are available as is a wide angle bellows.
The standard bellows is really enough. The camera weighs just over 5 lbs. 6x9 normal lens is the Nikon 105mm, noticeably smaller than Hassie 80mm standard lens. If you've got standing aspen trees from 5 feet in front of the camera to infinity you are glad to be able to stop down to f45. View camera lenses, though certainly not cheap, cost less than comparable slr lenses, again due to simpler design.