I feel bad for anyone with gateways. They have more issues & limitations making them not worth having an all-in-one device. The forums are full of posts on issues with these. The only saving grace is to get Comcast to put it in bridge mode & use your own router.
They actually are VERY great wireless APs but the firmware cripples it by a large amount. This thing has outstanding range ... until you connect and it decides to throttle it's output power by about 50%.
Before it throttled it's power, it's range was comparable to the Asus RT-65R I had awhile back.