I received teh Sun Zero Bronn Industrial room darkening curtain rod about a week ago.  I installed this in my bedroom.  I already had great blackout curtains but it was a little annoying that the light would still peak through the sides of the curtains. Once I hung my curtains on this curtain rod I have not had a problem since.  I have been using this a week and the curtains have not slipped or moved at all.  Works great at keeping the sides closed.  It could be a bit more attractive but they are industrial curtains so that really is no big deal to me, plus being in my bedroom reliability is more important to me than fashion.