Doors purchased and installed are for a garden room / office, local suppliers of bifold could not deliver in time found these and after consultation with our builder purchased a set, delivery timeframe was know at time of order and the order shipped early. Doors installed by window fitter using the system for first time who rated the product for design, look and more importantly ease of installation and quality of instructions. We love the finished look and the ease of up use as it appears on the online video... would highly recommend.