Summary: This adapter seemed to be a reasonably priced, versatile USB adapter that works on multiple platforms. In my case, I needed to connect simultaneously to two wireless networks on a MacBook Pro running Lion. The part that nobody mentioned is that Trendnet's drivers were last updated in 2009, and do not work under Lion.
Pros: Dual Band, 802.11n, Reasonably Priced, Comes with pigtail soas not to block adjacent USB ports.
Cons: Horrid Mac drivers - must get new ones from RALink, A little bulky in a port