30yr to 15yr with loanDepot

I’m currently at 6.875% with $280k on my mortgage with 27 years left. Purchased the house for $300k. I’ve been talking with loanDepot and they are 5.500% for 15 year. I would put down $40k and I could get my payment around $2,480 a month (about the same as I pay now) after takes and insurance. I’ve called a couple other lenders and they can’t get near that rate.

Do you think I should go with them? Would save me thousands in interest and would pay the house off faster.