The air conditioner is good in every way, except one....and that one is annoying. I must say it has worked very well in 100 plus degree weather...it's been a life-saver. The problem is....every second it's loud then soft...loud then soft...loud, than soft...every second. It sounds like the compressor is hunting....there just is not a steady sound coming from it, like my other window units......this noise is very annoying when I'm in bed trying to sleep. I called your company and asked ti speak to a technician...they said they have no technician and to describe the problem to him.....I did....he said it was normal....if I knew this was normal I never would have bought your air conditioner.......I registerred the unit......I guess I'm up the creek and will have to live with it or sell it. I'm 78 years old and it was a pain in the fanny to set up and install..