Super unit! Very powerful and it's keeping me cool during the Heat Wave we are having in Western Canada. Also works as a space heater, which will be useful in the winter months. It is very heavy so has remained on my main floor, but has wheels to maneuver it around. Only difficulty I had was attaching the  venting hose to the window piece....the hose seems a bit too large in circumference so it was hard to attach. Solved the problem by adding some duct tape to hold it in place. 4 stars instead of 5 because of this problem. Otherwise very satisfied.