We took a 300 mile road trip today, about half on 4-lane and half on backroad 2-lane. So we had a good mix of cruising at 65 - 70 with the cruise control on and rowing thru the gears on the backroads. The only time Debbie had a complaint about the exhaust was on the backroads, when we were going up a long hill and I was lugging it a bit, running about 1800 RPM in 5th gear. The exhaust was a little boomy in the cabin. But downshifting into 4th and bringing the RPMs up a bit solved it. Debbie said the exhaust sounded good otherwise, and when I asked her if she was ready for the 7-hour trip to CF2, she said "absolutely". So the Solo exhaust is Female Approved!