I've got an S5 Cab that I use as a daily in Chicago, and I honestly have only had one time in my over two years of owning it where I wished it was a coupe or sedan. For a convertible, it's extremely livable, and even in the winter, most people don't believe how nice it is with the top up in terms of noise, warmth, etc.

Let me know if you've got any specific questions! I'll be happy to help.