Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Just what I needed

These things save space, and they seem to work just fine. The disc label itself becomes the cover on both sides (there's no slot for a normal paper cover). These cases are more flexible than a standard thin case. That might be a slight con for some people if you prefer a more solid case, but they are just fine for me. As soon as I got them, I wished I had ordered more while they were on sale. Definitely will buy again.