Even though it's still fairly cool outside most of the time, our apartment gets pretty warm, I guess because we face the afternoon sun and are on the 5th floor. However, I've really come to enjoy having the window open. I know I've mentioned it before, but we open the window at least for a little while almost every day and I just really enjoy it. Even when it's almost freezing outside we have the window open just a little bit to bring in fresh, cool air. I enjoyed having the window open at our previous apartment, too, but our apartment was too cold in winter to have the window open to the even colder outside air and of course it was way too hot in the summer to bring in warm stagnant air. It's nice that it works out that our apartment stays warm even in the winter. I just like how having the window open makes us feel a little less isolated from the outside world and keeps the air in our apartment from becoming stagnant. I'd much rather have cool air come in from outside than have to run the air conditioner. I hope that when it gets warmer here in the summer that we're still able to open our window.