For me, cleaning the chain off the bike with OMS was a revelation. I couldn't believe the amount of crud that came off after a year of using one of those chain cleaners, or how much more effective it was at getting grit out of the chain. (I then gave my chain cleaner away to a friend.) The drivetrain ran so much quieter and more smoothly it was amazing. The OMS lasts forever in a sealed container, and with a Wippermann connex, getting the chain on and off was a snap. The whole procedure took maybe 5 active minutes. So much easier and less messy!