to get to the 0% interest, one has to finish 6 years of Phd, 4 years of post-doc and 6 years of assistant professorship struggling everyday. no, 16 years of your life is not worth the interest rate.
as of today, I'm quoted at 5.625% with 1 point. should I lock it? It seems that there are lenders who's offering lower rate around, but since I'm closing on 6/30, is there enough time if I switch lenders, starting the whole application process all over again?