I collected my car with the hard top fitted. The design of the rubbers did not look condusive to being watertight. The windows press against the rubber and the rubber seal where it meets the windscreen piullar was on a slight downward slop, perfect for water to sit and then work its way through the join.
Sure enough some water got in. Took it back to the factory where they changed the rubber seals completely so that the window closes into a groove and the hardtop became totally watertight.
Removing it was easy although to be on the safe side I got someone to help me lift it off the car and carry it to the garage. It is a lot lighter than the old steel hardtop on my SL!
As yet, I haven't tried refitting it. Will wait until November time.