Here's an honest review.
Service quality is on par with verizon prepaid (and dare I say maybe even better sometimes). The issue I have is with the service just stopping around once a week, which toggling on and off airplane mode fixes. But the unlimited hotspot (albeit one connection, but I don't need more) makes up for that forsure.
But by far the best thing about visible is their Customer Service. Now I know you can't call, and only chat, but I have never ever seen such knowable CS. They know what's coming on the next app update, they know the exact date that more stock of certain phones are coming back in stock. With other places (especially amazon) chatting with a rep is horrendous, and they don't understand a blasted thing of what you are talking about, here they know exactly what you want and are able to fix it over chatting. Verizon CS on the other hand is impossible to get ahold of and are never helpful.