Gabriele G.wrote a review of Park Tool CG-2.3 Chain Gang Chain Cleaning System on December 3, 2017
Familiarity: I've put it through the wringer
I use a diluted degreaser and clean ~once every 3 rides (~10-40 miles each), at least so far in this rainy Oregon fall season. Chain comes out clean enough for all but the fanatics. Noticeably quieter drivetrain since I started using this vs. brushes/degreaser/rag. Subtracting one star b/c I dropped on the pavement one time and the cheap brittle plastic cracked and now leaks. Don't imagine you'll find a better chain cleaning solution than this for regular and quick cleanings.