Some repeat delays in delivery, but as we had some slack time before fitting this wasn't a major problem. Notification of problems was handled well. However, my builder advised that he had problems fitting the window due to the clearance between the outer and inner frame. Also, now that we are experiencing colder mornings, we are getting a lot of condensation build-up on the internal pane and the sleeving which is dripping down onto our kitchen surface/floor. I thought the window was double-glazed, but obviously not, or not enough to prevent condensation. In retrospect, I perhaps should've gone for something from Velux.