Great suggestion. Thanks. I'm going to get one. I can't see buying a tool, especially an expensive one, that is limited to one use unless it were truly necessary for some reason.
This type of level would be just the thing to have when hanging a show, also. I like to align prints precisely, but the kind of alignment may change from show to show. For one example, if I wanted to align the tops of all the frames, I would set the tripod at that level, and then, rotating it, I'd know where to place prints all around the room. Of course, where to put the hanger is another story!