We didn't attempt to install this unit ourselves and of course paid dearly for it. However, it made such a big change in our kitchen that we feel that it worth every penny of it. We both cook and our ethnic dishes used to fill the whole house with onion-sausage-garlic smell. Our previous downward fan just didn't do a good job in an open design house. This one works!! Yes it is noisy when we put it on 5 or 6 speed, but I guess if you need a good suction it comes with the noise. That is only necessary for sauteing, for cooking 4 is an efficient strength and much less noise. And of course the unit looks beautiful, it is high tech, modern, sleek. We changed the lights above the cooktop around the hood into the same small stainless steel led lights and the whole island looks great!