It's cool that the vacuum pump is never exposed to any oil. It comes off the base, so storage is easier and the container can be easily emptied. Marks on the side of the container tell you how much oil has been removed so you can add the right amount of fresh oil without measuring and re-measuring. Since the drain plug on most pans are not at the lowest spot of the pan, I'm getting more used oil out than I did before using the plug and without the mess.