Of note, if you have a larger order and decide to split it up in smaller valued shipments, make sure you don't order everything at the same time with the same arrival date. *If on arrival Aduanas realizes it, they'll stick everything into 1 shipment and charge you the tax. *Not your shipper's fault.
In POP we used CPS. An employee left the company and started Aeropac then the name changed to Marine Express. Miami address and 150 RD per pound. Works good and we get email alerts. Oh...and no tax under 200.00 US.