I bought the three pack of pods today and they have so far been a complete waste of money. They refuse to connect to my gateway no matter what I try. I've reset the gateway to default settings, etc, etc and nothing works. Called support and after the mandatory 30 minutes fighting with the IVR got through to a real person who tried his best to help and then escalated to T2 who also tried everything he had at his disposal before admitting his frustration at the lack of KB articles to help.
Bottom line, this system is a scam with no real benefits. They simply don't work and rely on people just plugging them in without testing. DO NOT BUY. Go and find powerline/WiFI extender solutions instead as XFi Pods will just waste your money. IMHO Comcast bought a wireless mesh technology but really dont understand how to implement it.