I've ridden an R40 SWB USS for two years, and I absolutely love it! My wife has a bike identical to it, but it is set up as LWB USS. The bike feels slightly longer than mine, but I could truthfully ride with joy and confidence on either setup. That is one of the Vision's strengths, you can configure it in so many ways. (My wife and I bought the spare boom and handlebars for ours so we can switch them around if so desired.) Now all that being said, my wife doesn't like her Vision and ended up replacing it with a Rans. Why? 1. The seat height is a little higher, so she was on her toes at intersections, with the other leg straight out in front of her. She's about 5'2''. 2. Because the bottom bracket is at seat height, she felt like it was using more energy just to stop and go and keep going. She likes the lower seat and bottom bracket of the Rans. I will confess that the rans is a very nice bike, I just like my Vision better!
Hope these comments help!