My 2 bits:
No, we've not used Consumer Cellular, but for several years we used ATT, whose cell network they use. Over those years we developed some pet peeves, largely due to gaps in their service, both in urban, suburban, and outright rural areas, so when our most recent contract came due, we jumped to Verizon.
Now, if you search for this forum's favorite cell phone service, it would be Verizon, hands down -- at least from my personal interpretation of many posts over the years. In fact, that impression was very important in our decision to switch, for we wanted better overall service.
Well, did we realize it? We've had Verizon for about 2 months now, using it, again, in urban to remote areas, and the service is not only no better than that offered by ATT, it's costing us more.
So, count us, so far, as unhappy Verizon customers -- we'd be much happier, I suspect, with CC, or still with ATT.
Just one couple's opinion ...