I’ve been using it for a few weeks now and I’m impressed. There is no build up of black gunk, it washes off easily and does indeed appear to lubricate the drivetrain. I’ve found that it took a few applications to get things up to speed and that a gentle brushing of the cassette post ride helps. Also, I use a dropper bottle for the chain and protect the discs when I reapply as it’s very runny. All in all, it seems a great product that does everything I need it to do, i.e. one product, instead of several. Everything is left beautifully clean. I still use Fenwicks suspension lube spray on the stanchions, dropper post and shock, mind you.