Customer service is beyond awful. As just one example arising today, it has taken three years to replace a simple window that failed under warranty. Promises that an engineer will come out are repeatedly broken, leading to wasted days staying in and cancelling other engagements. Today we phoned three times - at 10, 12 and 2 - to check that the engineer was coming as promised. Only at 2pm, after we had stayed in all day, did the receptionist admit that he had cancelled. This is typical of our experience since the installation. The time taken to correct problems under warranty is measured in years and not months, and only then when many hours are invested in chasing broken promises.