4.65% ARM 5/6 ARM - refinance from 6.5% 30 yr fixed?

Loan amount around $345k. Closing costs $6113. Prepaid interest/escrow reserves $2739.

mortgage amount would come down from about $2200 to $1811. Savings of $387.00. Break even point is 16 months plus if need to refinance again at the 5 year mark so I’m not sure if this is worth it. Maybe want to sell in 2-5 years though but that’s up in the air.