I have owned my Cube since October 2009. We immediately took it on a thousand mile trip from mid NC to Ohio and back. It was great. Lots of room for me, the hubby and 2 dogs. I wouldn't change a thing. Road noise is not an issue. It has no more road noise than my 2003 Corolla. It drives great on the interstate as well as in town. I am getting 32.5 mpg consistently. While in Ohio, my sister liked mine so much, she has since purchased one as well and loves it as much as I love mine. My husband loves the head and leg room.
Love the cup holders, the moveable back seat, and the oversized side mirrors. Virtually no blind spots. Of course I love the overall body design. I get lots of stares. It is so fun to drive.