Yeah, I get that it's intended for light users, that's why they promote the by the gig deal.If you're looking at low usage deals then Xfinity Mobile should be considered. If the words "throttling", "tethering", "unlimited" and "HD steaming" are important to you...probably not.
I frequently use between 4-8GB per month on T-Mobile and with three lines, that's $33 per line that I have. Not sure how xfinity could really benefit me.
When I tried Verizon around 2012 or so, I could not make a call at my house let alone, use data because I got such a poor signal at my house and I've been with T-Mobile ever since.
I may just see about opening one line on xfinity for a month just to see how things are these days with Verizon. I tried their service again on my iPad by just getting a day pass and the service was still non existent at my house. That was about two years ago.