Ok, you drive one.
Let me know how those 18 wheelers feel when they pass you...
I did. Not a problem. One thing is that even thought it doesn't look like it, you sit pretty high up.
I test drove one last year with a bunch of other cars deemed green at a show. The cabin space is ok but the engine in it did not impress me. Perhaps this was after driving a Lexus hybrid SUV which was velvety smooth in comparison.