I've been comparing these units for awhile, trying to figure out which one would be best for me. My Brother-In-Law uses 3 other brands that are 10,000btu and 11,000btu, but they are loud and have other issues with drainage and efficiency. I decided to try this one, and have been very impressed. It's much quieter than the others that I've seen used, and puts out much better airflow. I'm very happy with this unit and would highly recommend it!