to be honest...
Claro stinks... they do not deliver their promises, far from, and they are incredibly inconsistent. Even when you are supposed to get full speed, you will not even get close to it. When you complain, it is always your fault. In order to become a customer service manager there, you have to be a female of around 40, with a huge chip on your shoulder, problems with the menopause, and absolutely no interest in customer relations.
Orange is a hell of a lot better, but they have issues as well. Problem there is, I suspect, frequent changes of operations managers with a new set of rules each time. For a number of months I had excellent service, and more important here, customer service. Since a month now I still get the friendly service but the rules are ridiculous. When I got the contract for the flybox I got a free choice between 5, 10 or 25 GB per month. I chose 10 GB, but if I want to upgrade now it is a lot of hassle with credit cards, approvals, etc... We are experiencing a technical problem at the moment, and had to go to the main office in POP to "sort" it out. When we got there, they registered the complaint in their computer system, promising an answer within 72 hours (have not passed yet, so hoping). I have no problems with that, except for the fact they could just as easily have done that in Cabarete, which they would have done a month ago.
No experience with the other carriers.
The biggest problem in this country is the frequent change in policies all those companies do.