Had a metal roof installed about four years ago. Love it! Chose the reflective white, and it cut electric bill for a/c 26% in July/August. 40 year warranty. Awesome!
Even though this one looks like a regular roof from the street I still had a hard time getting it approved by the homeowner's association. They like the way it looked after it was installed. Also, it cut my electric almost in half this year. My highest bill has been under $180 and I'm in an almost 4,000 sq ft house.
Several of the neighbors are looking into this kind of roof and the permanent storm panels.
I'm saving my dollars and hope to install a natural gas generator to power the whole house next year.