Verizon is the worst. Horribly overrated network, overpriced, but somehow their marketing still gets to the majority of cell phone users.
Keep on mind that on carriers, specifically AT&T, not sure about others, Amazon cannot activate family plans. You have to sign up and get your phones under seperate accounts in your name first and then merge them into a sharable plan, which can be a big mess with the carriers, and can result in many hours on the phone with customer service.
I mostly recommend people to go direct to a carrier's corporate store or website and get it done right. Best customer service, and the prices are still fair.