Is Virgin Mobile a good carrier? Iphone?

Hi, I'm interested in purchasing an apple iphone 4s from virgin mobile. Their plans are significantly cheaper than at&t or verizon and i don't have to be in a contract. But I don't know how good the internet is. I live in Florida so the network should be everywhere. But will it take a long time to load pages, will calls drop?

I used to be a virgin mobile user before they carried the iPhone and I just want to let you know that the coverage map is the only significant difference. You won't get as good reception in many places, but other than that, the call quality is the same and so is pretty much everything else.