Hello
I myself own a fursuit (of my character Ito, here's a picture:
http://fav.me/d6t4iny )
It is pretty comfortable to wear once I have made sure everything is fitted well (I need to make some more adjustments so it will go easier and faster).
It does get warm inside, but once I have reached a certain temperature it stays at that temperature and does not get any hotter. I get used to it, but I do keep check on myself: Am I drinking enough? Do I take enough brakes? Do I feel nauseous?
It's pretty easy to take on/off, but I do need some help, especially because it's a full-body fursuit, not a partial. And it can take some time too in my case.
But yeah, you can have a very comfortable suit, and it can be very easy to take on/off. So I hope this answered your question