...was/is just fine. I'm assuming you are asking about the cabrio top in the closed position.
Truthfully, mine is plenty warm - really no difference in that area compared to the hard-top Passion - and thanks to the excellent cabin heater (and my heated seats!), I've seen no problem. It was just fine a month ago as well when I drove it at -10 degrees.
Some owners have reported a 'slight' difference in audible wind/road noise through the cabrio roof, but IMO it's very minor and nothing to dissuade one from getting a 'cab.'
Let us know your decision and what you end up getting. I was just in the Bloomington smart center today and they only had one or two 'possible' orphans - so act fast if possible. ;)
- FRED "2 MUTCH"
Is it a car? Is it a mind set? It's BOTH!