Overall works very well, keeps our main living area cool and is usually much quieter than a typical window A/C while allowing light into the home by not covering the window. It is usually very quiet, but occasionally vibrates our entire wall during changes between fan speeds. Recommend making good use of foam padding all around the unit when installing to both reduce vibrations and make it as efficient as possible. If you are noticing vibrations, make sure you check anything hanging on the walls; picture frames might be the cause and can be easily fixed with some putty. Recommend 2 people for install, it is a heavy unit and having one person outside and one person inside makes it much smoother.