Just installed this today. I have central air but like to sleep cold (I'm old. Haha!) and didn't want to cool down my entire house for that purpose. This unit cooled down my room pretty quickly. Even on the highest settings, it super quiet. It was easy to install and the YouTube video made that process even more simple. No one can remove the AC due to the window locks and low proflie of the unit.  That was a huge consideration for me in choosing this style AC. So while I just installed it today, I think it's a great product!