I have been with them for many years, and generally speaking, I am quite satisfied with their service. Check out CPS (Caribbean Parcel Service, I think) if they have an office in POP...They are also very good.
I've had an account for six months and am very satisfied. I don't have any other US address so any mail I receive comes there. I've also had several packages delivered from items I ordered online from the states. No problems to date. I think the prices are reasonable. Good service.