I must be very lucky with my Aero S5 with respect to it being watertight. Drove through the worst downpour I have experienced going into Italy back in July, fully expecting to find water in the car and the boot but honestly, not a drop was found, I did have to reduce speed to about 25 as it was difficult to see but pleasantly surprised nonetheless. I did find the soft top to be a pain and because of variable weather decided to leave it up most of the tour so wondered if a hard top would give any benefits and forget the soft on long tours.
Thanks for the feedback.