I know the men's room you mention. I am a student at UNT myself (physics major), and this semester have two classes in the EESAT building. Those waterless urinals are all well and good... until the filters clog. Then, you get the "lake 'o pee" that someone else mentioned above. The janitorial staff usually tape up a trashbag over the urinal until they get around to replacing the filter, and I have sometimes seen that take a few days. Once, I saw all THREE of them 'down' at the same time. It was more than a little ripe in there then, but normally, like you said, there is very little odor. They really do need to work on the reliability of the waterless urinals, because about half the time I use that restroom, at least one of the three is out of order.

I do find it interesting, however, that the waterless urinals are only used in the 1st floor men's room. The men's rooms on the 2nd and 3rd floors use reqular flush-type urinals. Is it that those waterless urinals were just a 'demo' project of the company that made them (getting free adverts from the plaques mounted above EACH one of the three -- at nearly eye level... you can't miss reading them while you are taking a leak), or is there just some reason they can only be used at ground level?