A second wave of 802.11ac wireless routers have begun to appear, and the new must-have feature is MU-MIMO, short for Multiple User, Multiple Input, Multiple Output. We already reviewed the first two MU-MIMO routers we could get our hands on from Linksys and Netgear, and now Asus has entered the fray with a dual-band AC3100 router dubbed the RT-AC88U. This is a flagship router that has all the bells and whistles one would expect at a $300 price point, but it differentiates itself from the competition by offering Link Aggregation and eight LAN ports, which are uncommon features in a consumer-class router...