This is the laser level Rob was able to borrow from a very generous contractor he works with at work (can I say that on here?) You basically set it on the stand, turn a few knobs to level it and then it spins a level laser line around the room:

The problem with levels as I may have mentioned before our house is NOT level, is not quite square, and there are not even flat ceilings or floors. Most of which goes unnoticed until you bring out the big guns like this:

It was super helpful in setting a bench mark for our future dining room wainscot, shown here. We also used it to set a line to install the kitchen cabinets at the right height.

Thanks again!