In a day and age where connectivity is everything Sprint and other carriers have done an excellent shot making connectivity functional and cost effective.
Plans, like mine offered by Sprint, provide significant funtionality from the road.
Though the service is not perfect, it is definately good. Sometimes it is slow, sometimes you cannot get signal; the list goes on. I have not however experienced problems in any major airport or major city except when at sites built underground or in significant fortresses that don't facilitate phone signal at all.
A solution similar to these is a must for anyone on the road, whether that be in the care around a metro area or across the country one airport at a time.