This fan is a keeper. I've been using window fans for a years and they have saved my life during the summer months. I also use it year round for white noise and to keep the room cool which is essential for quality sleep.When I tried to buy it last winter it was not in stock on Amazon or Walmart and because it was off season the price was high. I purchased the Expandable Twin Window Fan instead and what a huge mistake. https://www.amazon.com/gp/product/B00VNCHYV2/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1It was broken within 5 months so I finally saw this back in stock and got it. The Holmes fan is great; you can reverse it; (which I've never done) but I use it at night to draw in cool air into a hot bed room. I always use high. This thing is powerful unlike other fans, and it immediately will cool the room down significantly.Let's face it; some people can be pretty anal and different and change isn't their thing so if there is any noise in the room they get nervous and can't sleep. if that is you and you still want a fan, put it in and get ear plugs because if you use a window fan in hot months you will sleep like you never have before.It also saves a ton of money. I have two friends that now swear by these when before they were using the air conditioning for most of the night and that is expensive; very expensive. Now they pop in the window fan into their room and their kids room and it's sleepy time.For safeties sake, I use a small window lock on the metal frame of the window at the bottom to lock in the window when I use the fan. It gives me piece of mind to help against break-ins.PRO's:-Cost-powerful-two speeds-durable-light weight but built well-works great!!-will fit almost any size windowCON's:-some will say it's noisy but it's more like white noise.No more uncomfortable summer nights of sleep. This is a staple in our home.