This is my 3rd and final purchase/installation, I have had minor problems each time. 1st job - Chunks of metal, which flew out from under the lawn mower narrowly missing my dog. 2nd job A door handle mechanism so stiff I struggled to open and lock the door. On the most recent installation on 19th November (3 upstairs windows) one of them was "mismeasured" by the Survayer so was installed without a sill while a new window was made... I chased a week later and it was installed on 29th November. I have no issue with the quality of the Product or standard of installation but I feel the other niggles could and should have been avoided.