As has been said re performance being down due to added weight etc. The corner issue takes some getting used to but it will still hold its own and fling into around and out of a corner...just a bit of compromise needed.
Mine doesn't creak but the cabin is not as quiet as a saloon. Everybody's interpretation I guess which is why you'd need to test drive one. I absolutely love mine and for all the down sides I'm still happy with it. I prefer the shape of it as well as compared to the e90/92.
Top down is the absolute borrocks!!!!