Bought this as a blackout option for my son's room. It fits perfectly and definitely keeps the sun out. It's probably a little on the pricey side and can be fiddly to fit adjust right to the window but overall a great product.
I ordered this to black out the light in my sons room. It worked really well and was easy to put on the window and take down. It has suction pads all the way around it to stick to the window (although these don’t always stick to the window). The blind can be reduced in size by pulling the sides in which is ideal to fit different size windows. The blind is quite big but not big enough if you have a bigger window.