Except the expensive installation fee we have to pay – after read all reviews we decided have someone installed it for us, the product works very well. We feel much ease during cooking right now. A little bit noisy, but understandable. Only issue is the installation, can the company figure out a standard way for customers? We already have all vent and pipes be installed previously, hanging this stuff cost us more than $200. Our friend who is also interested about this product, get a quote of more than $1000 because they do not have pipes pre-installed.