Goop has been around a long time. I remember my Dad using it over 40 years ago when I was just a small child. It is something NO mechanic should be without. Also, if you work a lot with your hands and get their really, really dirty, Goop is what you want to clean them. While I don't know what the ingredients are, it works. You can have you hands completely filthy with motor oil, grease, or anything else you can get on them while working with tools, cars, etc., and if you rub a big scoop of Goop on them and then rub it in and all around, it will dissolve all those products. Just wipe off your hands, then rinse well with soap and water, and you'll be ready to start the day again with clean hands. It must have some type of enzyme that dissolves oils and grease, because that how good it works. Performance Excellent. Dissolves the thickest and dirtiest grease and oil and dirt on your hands and other parts of your body. It'll even get under your nails to get them clean, too. We keep this product right at the shop sink for everyone to use after work. Scent I don't remember it having much of an odor. It wasn't offensive, whatever the scent was.