I've thought about getting a Fumoto, only problem being that people seem to report that it takes much longer for the oil to drain.
In very specific applications like our fleet trucks the Fumoto valve does not allow the faster, flushing drain you get with the stock drain plug. This was an issue here and was verified by oil pan removal. A very thin layer of sludge was formed on the bottom of the pan.
This is a good point. The best way to drain out old fluid is to remove the drain plug.
I still have them on cat pumps and blowers and two cars. A terrific design, never comes open accidentally. But not the best for everyone...