This paper cube with its sturdy plastic case and the 3" x 3" loose sheets is a good buy. The loose sheets are a bit thin, but not as thin or flimsy as with many of these types of cubes. I recommend it.
We keep one of these note cubes near each phone for taking messages. Also handy in my office. They are not stick-on notes but have many uses. My husband really likes using them for shopping lists.