Perfect.  Just what I was looking for.  Use them in my baby's room to make sure his room is as dark as can be.  As with all blackout roller shades and any curtains, you will get a tiny bit of light coming from the sides.  Unless it's glued to the wall you'll always get that.  I just put a set of blackout curtains up as well and it does the job as best as possible.  Good quality. Easy to roll up and down.  Doesn't get stuck and rolls back up evenly.