I'm a Simple Green user. Used to buy the expensive degreaser (and bought the whole chain cleaning kit, too- which I never use anymore). The mechanic at the LBS told me Simple Green works just as well, and is soooo much cheaper (and more environmentally friendly). I use it to clean the chain and cassette with a bristle brush, and then wash my hands with it. And he also said the best way to clean the bike frame is with Windex. I love multi-purpose cleaners that will not only clean my house, but clean my bike!