Is it Worth Refinancing a 30-year Fixed FHA @ 3.625% interest rate to a 4.3% conventional loan without PMI?

Let’s say you purchased a home in Mission Viejo, CA in the summer of 2013 for $659,000 and got a 30 year fixed FHA with a 3.625% interest rate. That sounds great so far but it was done using FHA which comes with PMI. The borrower only put down 3.5% and has to pay $677 every…