We had 4 x 3 meter windows installed. The view is the most important part of the house so the quality of the product was paramount. From the start the service, support and communication before and after installation was excellent. Dan and his team were most attentive and responsive. No question was too much trouble and the speed of the responses was really impressive. The installation was quick and professional and even though the installation was complex it went extremely quickly and smoothly. The team were very efficient. As expected the product is excellent. Thin frames to maximise the view, easy glide and the doors have a solid feel. The 3 meter windows are easy to open and the locking mechanism is strong and secure. We have been very impressed with the products and Dan and the team. Superb product, excellent friendly service and support and I cant recommend Dan and Ultraline enough.