Seems to work nicely. I'm using them to store wax for bottle dipping. They are a perfect size for this because they don't store a large volume. 4/5 stars because there isn't any temperature control only on/off, hard to argue with the price though!
I love this little crock pot for keeping dips warm, but it would be a bit better if it had at least two heat settings. Dips can get VERY hot if you don't watch it, or if the dip gets less then half full. I've avoided issues by unplugging the Little Dipper when it is less then half full.