Yes I would, and almost did with the house we just bought. I'm very careful (almost anal

) with my money.
We bought way below what we could afford. An interest-only loan would have made sense if the rates were low enough-they weren't.
HOWEVER, we would have had the discipline to take the difference between what our payments were (say $700) and what they would have been with a 30-yr loan (say $1200) and throw that $500 into investments every month where they would make a LOT more money than sitting in house equity. We wouldn't have just thought "Woohoo! $500 extra a month!"
At the end of the loan we would have been able to pay off the loan in its entirety and have lots, lots, lots more left over. We may refinance if interest rates go down significantly (not seeing that happenin') and it makes financial sense.