One thing I've always liked are blinds that use custom min/max/close buttons. But when all three look the same, or four if there's also a rollup button, I end up not using the blind. I like being able to move my mouse to the upper right, instantly picking out the button I need. If I have to count them I give up.
This blind is too dark for my eyes so it's not an issue but thought I'd throw in my two cents on the buttons.