I'm a fan. I met one of their reps last summer at Camp Perry during the national matches. I bought a bottle and took it home to give it the Pepsi challenge. I now use it on all my guns. It's non-cancer causing, as stated above works quite well on copper fouling, has an organic smell to it, keeps barrels cooler during rapid firing. My single favorite advantage is that it's non-static. What this means in practice is that it doesn't attract dust and dirt like most petro products. One cautionary note from the vendor was not to leave it on plastic parts for an extended period. I've been using it on Sigs, ARs, and HKs with plastic grips with no deleterious effects as long as I wipe it off per the instructions. Also, each bottle is marked with a stamp to point out to the TSA guys so they don't hassle you at the airport checkpoints - the stuff isn't caustic or flammable, and is allowed in checked luggage with just the cap on it.