Seems like a fantastic deal for a modern spec dongle. Supports dual band so it will work with old and new kit alike.
World’s first AC1200 Wi-Fi Adapter with a USB 3.0 port
Backward compatible with 802.11a/b/g/n standards
Dual-band wireless connectivity for 2.4GHz or 5GHz
Adjustable foldaway antenna for optimum Wi-Fi performance
Compatible with Windows 8
Careful with the reviews as the comments apply across the range (from the tiny N150 and up).