I have blinds in all my windows - but I have to admit, I HARDLY EVER put my blinds down unless I am getting dressed in my bedroom, etc. So, it is not a problem. My cat sits in my front bedroom window and those blinds are always up unless someone is staying over and sleeping there. And, he goes in the back window but again, I just don't pull my blinds closed much. Usually if I do, it is at night and the cat really doesn't go up on the windowsill in the evening; only once it is light.