I've owned a lot of different window air conditioners in my life, and Windmill's is by far the best. It's significantly quieter than any other unit I've ever used, looks great, and most importantly is incredibly effective at cooling our apartment (we have the 10k BTU model and our apartment is about 850 sq. ft). I also really appreciate that the air is vented vertically; I really feel like it allows for better circulation of the cool air. Lastly, the app is great; clean, simple, easy to use. Love our Windmill, would definitely recommend them to anyone in the market for a new window AC.