i had bought a 5000 btu ac for my bedroom in 2018, and it seemed to be fine. However after last summer I decided I needed something with more BTU. This summer after many nights of sleeping restlessly- I looked into a few different options and ultimately decided on this (5000 BTU) unit. I am so happy with it and have had wonderful nights of sleep. It doesn't feel anything like my old unit and is comparatively so quiet.