I bought two velux blinds for our loft. I fitted the first one after reading the manual a couple of times in 20 minutes. The second one was the wrong size (I would love to blame Velux but I think it might have been my fault). I called customer service and the lady could not have been calmer and more helpful. The replacement arrived and I fitted the blind in 12 minutes, single handed. (Congential amputation of right forearm). Next time I will target a sub ten minute fitting. And Velux collected the second blind. Great service and a great product.