Consumer Cellular

I currently have Sprint with a Motox phone. I am paying $177/ Mo. I have received a promotional flyer from AARP about a company called Consumer Cellular. The price is about a third of Sprint. Has anyone on the forum heard of, or utilizes this service? It is backed by AARP so I am assuming they are legit. I can use my old phone on their system and the supply a free sims card. Any help greatly appreciated.