What is your opinion on cell/smart phones for travling?

I use a Smart phone as I keep up with business doings while on the road. I also use it as a hotspot for my laptop and can use the GPS feature when wandering bout. When cell phone coverage is available it is usually on Verizon my DD uses ATT and I am connected a little more often in those remote areas. I also switched my land line to cell service as I can add it to my minutes for an additional tem bucks a month. I am not real tecky but have found that a Smart phone although not a must is a good companion.