I ended up getting both the 3 man and the 6 man Fish Inn tents since my wife (bless her) thought the 3 man was 'too small' when we had the little one with us
I've used the 3 man a couple times so far but not in any crazy cold or wind, no issues thus far.
the 6 man I just used for the first time yesterday, again no issues yet and my windows at first glance seem to be the same as on the 3 man and while it was cold yesterday it wasn't anything crazy either. One thing I did notice is that the short skirts are a bigger issue on the 6 man than the 3 man, I spent more time than i'd like trying to keep the light out, but that likely had more to do with the 8-12" of snow that was on Chickakoo than anything.