Pros: works as designed. very small. good range. once i installed the driver (from the included cd i think) my laptop started showing 2 sets of wifi networks. one from my built-in 802.11g and one from the usb 802.11ac. i have only used this with the 5ghz band of my 802.11n router, but in that scenario it has as much speed and range as any other device i own.

Cons: in the few weeks i have used this as my primary wifi connection, i have had to re-insert it twice. i think sometimes when i boot my machine windows does not recognize it and i have to re-insert it to get it to work. but it has not become annoying.

Overall Review: windows 7 64bit, usb 2.0 Buffalo AirStation N600 Dual Band Router i bought this because the 2.4ghz band is extremely crowded in my apartment complex, making it unusable on evenings and weekends.