I'm going to be honest and say that it was mediocre, bordering onto bad. It feels more like a cs map than an aq2 map. We played it some in teamplay on a lan this weekend, and we got bored of it after around 10 minutes, whereas we played approx 2½hours on rooftops!
Also, it's terribly hard to locate where on the map you are, since everything looks exactly the same. More info in WizardExt's review on the page.