Apart from Netgear, the RT-AC66U is one of the preliminary 802.11ac routers to enter the market. Design-wise, it bears similar looks as its RT-N66U predecessor, so there's nothing really new here. The ASUS router features a nice spread of Gigabit WAN and LAN offerings, plus two USB ports with excellent network support for printers, storage devices, and 3G adapters. The upgraded ASUSWRT interface is a positive touch. We like its attractive layout and comprehensive networking features, including AiDisk (file sharing via the cloud), Network Print Server, plus Media Server support for iTunes, FTP, and Samba. The pre-loaded IPTV profiles and QoS rules are useful too. The real strength of this router, however, lies with its AC performance on the 5GHz band. Its throughput performance remains unsurpassed by those from D-Link, Netgear, and Linksys to-date. This makes the ASUS RT-AC66U a formidable router if streaming HD clips is what you have in mind.