3 stars because of the crockpot and not the recipe, which is great. I have used some variation for many years. However, I recently purchased a new crockpot--capacity, 1 1/2 quarts. To my surprise, I experienced sticking and overcooked oatmeal. To clean the pot, I actually had to use brute force after soaking it for some time in water (I use baking soda as the abrasive--and I almost used rock salt as well).
This was not my previous experience. The old crockpot was at most 1 quart in size and had only one setting-of unknown temperature. It was on only when plugged in. There was no sticking or major cleanup needed unless I used too little water.
I may retrieve the old crock pot from the garage despite the inconvenience of having to plug it in and one setting. It may be that the manufacturer has changed the specifications in the coating-->sticking. (I have sprayed with Pam and even coated the inside with butter, but these had no effect on the sticking problem.)
With the new crockpot, I should probably reduce the overall cooking time by at least 2 hours--if I remember to turn the crockpot at a later time.
One final note, I would never spend an hour and a half cooking oatmeal over a double boiler. I have followed the package directions of 30 minutes on top of the stove. That procedure does require more attention to stirring compared with none with a crock pot.
I hope we can get some feedback and recommendations from the person who tested the recipe before giving it to us and/or the crockpot manufacturer (Rival for me).