The reason why Ruckus Wifi is great is bc it uses "dynamic beamforming," which basically means that the wifi signal can find the path of least resistance. It makes for stronger, more reliable signal in general. It's most useful in problematic wifi environments with lots of metal, glass, or interference; works wonders on crowded NYC offices and hospitals and the like. The reason why schools tend to like it is that it's also affordable - less AP's with same signal = less money.
Hope that helps! More info on nyc-specific wifi issues and Ruckus: NYC Wireless Network Solutions - Urban WiFi Challenges in a Big City | Ruckus Wireless NY