I believe "mbe" and mail Boxes Etc are the same company. They are affiliated with UPS in the US. I have account with them and have had no problems, but heavy iteams and costly items are a bit expensive(on items over $200 they charge customs). Jeremy Engman is the manager at the LT store and he is very helpful - 809-240-6347 or
servicio1@eidominicana.com
I don't know anything about the other company.
Good luck!