During the recent heat wave we broke down and bought this for our apartment. We use only while home, you can pop it out and get it in the house if you left it in the window. It has wheels and rolls pretty easy from room to room. The window part is a little hokey, but we added wash clothes to fill in gaps, every window is different. I do wish it was a little more secured, but it's nice to sleep under a blanket for once! So Cal gets really hot! No winter it feels like. It's a bit expensive and bulky, but does the trick. No more sleepless hotter than death nights!