I am closing on my house (re-finance due to divorce) Friday and going with a 6 month LIBOR interest only loan. I plan on remaining in this house for another 2-3 years.
A 30 Year Conventional Fixed with 5. 375% interest has $176 applied to the principal every month. Now taking the same total payment for the 30 year and applying it to a 6 month LIBOR at 3. 625%, I will be applying $339 to the principal every month. I know they interest rate will vary, but I will still be applying almost twice as much money per month to the principal as compared to a 30 Year. Not a bad deal in my opinion.
True, the key is to make the payment to the principal every month. Otherwise, you gain nothing. Not sure how I would like an interest only loan for a full 15 to 30 year term. Will have to do a cost analysis on it.