Better coverage is very geo specific. We have zero ATT at my home, but 2-4 bars Verizon, I often have 0 to 1 bar with ATT in NYC, while folks w/ Verizon have 4 or 5. ATT does fairly well in DC, as does Verizon, so someone living in DC and never leaving could be very happy w/ ATT.It'll have to have more than just "better coverage" as an answer.
One question here is how long Sprint will continue it (the same goes for ATT & V). At some point the grandfathered unlimited data plans will likely have to go.Considering switching from Verizon to Sprint mainly due to price. Currently grandfathered into Verizon unlimited data so still debating whether to lose it or not.