They do just what they advertise: remove the grease. The delivery man showed up quick and my order was right. I had a bacon cheese burger, but it wasn't with a side of oil. It was perfect, grease-less, half pound of beef-berger. The bacon was just as perfect; no giant bubbles of fat or fat at all. And so far, this is the only place I have ordered from in South Philly that HASN'T burnt the fries.