This is the only convertible I've ever owned, so I can compare it almost solely to hard top cars. The ONLY times I've noticed excessive noise (higher than hard tops) is when precipitation is hitting the roof, and when the roof is retracted. Naturally, you would get wind noise with the roof open, just as you would get wind noise in a hard top with the windows open. Precipitation hitting the closed top is no worse than it is in many hard tops I've owned, even less than some hard tops. But, there is considerable additional noise when the roof is only opened up a bit ... not fully opened.
I dunno, maybe my hard tops were noisy hard tops?
My primary concern with the cabrio is that I'm really not very clear on the proper care and cleaning of the fabric. And, as much as I open/close it, I am a little concerned about the durability of the mechanism.