The effect is fine, although it's simple quality (flexible, plastic-coated cardboard in vivid
color). As noted by another reviewer, the "CDs" are larger. This doesn't affect my routine since I
don't refer to them as CDs, and it does make them more visible. My complaint is that there are no
English instructions and there's no disclosure of this fact in the sales blurb. Granted, it's a
well known methodology and anyone who has been around will be able to figure it out, but in the
interest of full disclosure, the lack of readable instructions is a pretty big deal. I think
Penguin should be up-front about this. Also, the sleeve for the changes isn't durable enough to
stand up to repeated openings (also previously noted by another reviewer). You can remedy this by
making one of your own that will stand up to the final opening. All-in-all, an OK piece of
merchandise but a poor and incomplete description.