This looks really promising.
I was just about to write a blind review, based on the assumption (from my experiences with other location-based apps) that there wouldn't any listings in my local area (a not-massive city in England - York). But it's a good job I looked first, because there are quite a few.
So, at least for my location (which often isn't served by this type of app), it appears to be a good way to find relevant classes & locations. It's definitely something I'll be looking into, and after downloading, will probably use.
So, thanks for the hunt :)