We got one of them fancy laser levelers the other day at the home improvement store. Heard and seen so much about 'em on TV, we could hardly resist. They set up a nice small area for all the laser level devices, too. Just about every major brand has a laser level offering, so we just picked one out of the pile. It has an LCD readout and built-in stud detector (though I believe it's broken, as it never senses that I'm around). I don't hang things that often, but when I need them to line up, the laser leveler will definitely come in handy. However, the one we chose doesn't have a suction cup. Instead, it relies on pins that you must manually remove and stick into the wall – not the easiest or most intuitive way, IMHO. Maybe all the laser level tools are built that way?

See, the laser leveler worked well here.

Here, as well. However, as the third image illustrates, someone forgot to use the laser level thingy earlier:

I know you're not supposed to point the laser level's laser directly into your eye but I can't help myself. It's not like gur fhpxre jvyy qnzntr zl rlrfvtug. Bbcf! Bu obl.