The air conditioner works well and cools as expected, maybe even better. However, something on the inside of the air conditioner and another piece were broken when we got the unit. The inside piece didn’t fall until we already put the unit in the window so we didn’t know anything was broken. It doesn’t affect the function of the air conditioner but the unit rattles slightly when it’s running. I am not sure what the piece was and since the unit still runs it’s not worth uninstalling and waiting for a replacement unit in the 90+ degree weather.