Installed two of these in our bedroom recently to replace traditional horizontal blinds.  These are so much better in every way.  These are true blackout shades, meaning there is zero light transmission through the cellular honeycomb material.  The only bit of light is the slight leakage around the shade itself between the window frame and the shade, but it is very very minimal.  The quality of these shades is excellent and the top down bottom up features work flawlessly.  Very easy to install too.