i had a bunch of these once and shot a couple -- it was fun, the film was about this old and had a base fog that wasn't too much of a problem because it acts as a neutral density filter in the darkroom...
Biggest problem was handling the film in the darkroom -- it's 4 by 5 but thinner film because pulling the tab pulls the exposed sheet around a pretty tight corner inside the holder so it's in back and the fresh sheet is in front. Each sheet of film also has a paper backing. When you take the thing apart to get the film out you end up with a whole mess of paper laying around on the floor, scraps of random metal from the holder itself, and a lot of fiddling to get the film into whatever tank/holders you are using because the film is pretty floppy.
So it was fun, and you should definitely give it a shot, if only to appreciate what press photographer had to deal with in the 40s and 50s when these were in common use. They did speed up shooting pictures, which was a key goal for press photographers.