We loved the look of these blinds and ordered for our patio door.   We were disappointed with a couple things  relating to these blinds.  First, they open up the wrong way.  These 4 panels should open from outside panel back, but they open starting with the back panel. If you need something to open right to left, they will be perfect for you.  Second, I would not call them "room darkening".  Light does not necessarily shine through, but they do not block the light totally like a room darkening shade or drape.  We love the sleek contemporary look of these blinds, so we kept them.