The logic in the February, 2015 issue of Consumer Reports is all over the map, it kind of makes my head explode, but at least they got the ratings right.
Ting comes up as #1, Sprint as #last. See attached image.
How Ting can do this while using Sprint's service is a grand tribute to Ting staffers & management.
With GSM coming, I hope Ting is staffing up!