Finally got 5.1.1 yesterday. My s6 seems to be running much more smoothly so far, but to my my big disappointment, my credit card isn't supported by Samsung Pay... Hopefully we won't have to wait this long for Marshmallow, gents, haha.
I talked to Cricket support a couple months ago and they gave me the generic, "we don't have a timetable for that yet." I'm pisssd. My battery life sucks and I was hoping and update would fix something. They better at least give us a more major update like marshmallow coming up