Ok here are some pics of the blackout ones from our bedroom.
Shade down:
Shade up:
Cel closeup:
Light leakage: (this is with the flash off and I cropped the photo try and show it)
I will say after looking closely that I would want curtains around the edge at least like we have. The curtains hanging like that blocks what little light is coming in.
Its kind of tough to take a picture of a dark room.

I hope this helps.