After a few trys of fixing the blinds I finally got there ! I was concerned I had made the wrong choice and wasted a few hundred pounds, but once I really studied how to fix the tension an did them right i am thrilled to bits . They look so smart and will cut the severity of the sun out in the summer while giving us privacy if needed in the evenings. I am so impressed now I will be ordering more ! It does take a lot of patients to fit them and for someone like me would be usefull to have a little more detail with the diagram or closer pictures, as I found the short video helpfull but too quick to get to grips with the finer detail. Would highly recomend though as no drilling into upvc needed .