We bought out current home in 2007. Interest rates were high for the time so we went with a 3/1 ARM. 3 years after we bought, interest rates were much lower. A few years later, we locked into a much lower rate. Although we are not gamblers, sometime it pays to take a little risk.
A few months ago (same house), we re-fi’d into a 10 year IO loan with cash out @ 2.6% rate. It’s hard to qualify for low-rate IO loans but we met all the requirements. We now have 9.5 years with a decent rate and a very low mortgage payment. A lot can happen in 9.5 years so we have lots of options.