Purchased window for new workshop. Delivery happened as per advice no complaint there and delivery driver was good. The window itself appears to be ok (time will tell), the glass however did have a black sealant on it which had to be cleaned off. The biggest problem with this Company is that you cannot speak to anyone in customer services..... I suspect this dept doesn't exist!!!! The window was missing the key, therefore lock is useless. Called Dunster to check length of warranty and advise that key was missing, to be told by the annoyed and irritated member of staff i spoke to... "Look up the warranty on the website and send an email re the missing key". When i advised that i couldn't send an email i was told, "to write a letter.." There's customer services for you.... Won't be bothering with this company again.