I'm one of those people that reads all the instructions before starting, but this one was had a really confusing diagram and written directions. I started following them and disassembling the cords when I realized it was for using the blinds with hooks for "cord-less" operation. It arrives assembled, and all you need to do is attach it to the wall. It blocks most of the sunlight, but not all which is exactly what I wanted. It's not very good for insulating and I can imagine in winter it'll be cold. It's a bit flimsy and feels like it's going to break any moment, but I've had this for 4 months and it's still in great condition. For the price, it's a great well-designed value.