Someone just posted on his yesterday on the Yellow. He really likes it. That said, other's don't care too much for the Mendoza due to the special dieseling setup. They are meant to diesel to get higher fps, but it's erratic. There's an oil port over a fiber ring near the piston seal that is supposed to provide the fuel. Once the oil is depleted, the gun's are said to settle down but shoot .22's in the 600's or so. And I think the triggers can't be worked over, so you have to hope for a good one. Still, they are kind of a neat gun. The owner stated he had no issues with cycling and you can see when you are out of pellets, unlike others that end up getting dry fired. I would like to find one of the Crosman RM622's.