Cutting the cable, lets talk options and media setups

A parallel question. Does anyone have ATT Air for their internet? I currently have ATT Fixed Wireless and it's pretty good, but they are phasing it out and I want to make sure I don't end up paying the "you have no other choice" tax. The guy at the ATT store made Air sound awesome, but I would like to hear from someone that actually uses it. What is the Wifi coverage like? Is it dependable? etc.