These are the perfect size for small children's garments or when you only need to save fewer stitches. I know I can always use waste yarn instead but these are handy and easy to get the stitches back on my needles with.
These are great -- especially since there are three sizes. I'd appreciate one a little bit smaller for mitten thumbs, but otherwise, only one teensy complaint usually when you want to take stitches off, you're coming from the wrong end. Holders that let you take stitches off from either end would be better in some situations.