I think what we all tend to forget is we drive our cars with the top off when other cars dont and after half an hours driving in dampish conditions most cars would have a less than clean glass on the inside,My mates mx does as he always drives top off as i do. As both simong and myself have both driven at 140mph plus the mk1 is superb very planted roof up and down track obviously.When i test drove the new plus8 it didnt feel as good at the top end of the scale,having said that the aerodynamics are very different the only gripe the side screen wobble and that roof which weve all come to now very well, otherwise a stonking car great auto box carry some kitchen towels for the inside screen and enjoy.