What to ask or know before mortgage refinancing?

[sunfalcon]

We refinanced last December - went from 6.25% to 4.5%. I refinanced with a 30 yr loan, but am on the 10-year payoff track. Figured that if something went wrong and our income diminished, we could fall back on the 30-yr payment in the interim. We had had the house for 4.5 years at that point. Plan on staying here until I can't walk up the stairs anymore Hopefully a long time.

After a year, so far, so good.