I took a chance and ordered 2 sets of blinds of my 14 windows that need them. I did see a few negative reviews but i saw more positive reviews so i rolled the dice. They were not only perfect (inside)fit but a beautiful color. Dare i say PERFECT!! So, i am now convinced that most of the reviews must be because a human error in measuring! Thats the key! If you follow the on-line measure instructions its more easy than i thought. That was my biggest worry , was that i was going to measure right. The POINT of all this is I saved about $1,400 by doing it myself. It took time but I just did the front 2 windows first and did the rest on my spare time. I must say that the agent I talked with was extremely friendly.