Key advantages include:

The CNMI has the advantage of being affiliated with the United States. Residents of the  CNMI enjoy American citizenship, Constitutional protections and other benefits while 
retaining control over internal affairs such as taxation and customs policies.

Location (proximity to major Asian markets);

U.S.  Governance (U.S. jurisdiction, U.S. federal law is applied and all business transactions are protected under the U.S. federal court system, English-speaking and dollar-based 
economy)

Its unique control on taxation and customs policy.