The other service I advocate for people is Ting, since its only $6 per phone, though you have to buy the device. But the Nexus 5 is such good value for hardware it isn't even that expensive, and they have that same early termination relief deal.

I have around a dozen people on one Ting plan, and since the monthly bills adjust for usage I usually only owe around $120 total, and literally $60 of that is from the few people that use 1k+ minutes / texts a month. By comparison I know a family of 4 on Verizon with iphones and such that pay $400 a month for not even unlimited service.