I’ve been using Jade rosin for about 4 years now, and absolutely LOVE it! It’s smoother than any other rosin that I’ve ever used, and has a better quality. The only difference that I have personally found between light or dark boxed rosins, was that the dark rosin tended to sound warmer to me. But since using Jade, I don’t have to clean my violin nearly as often as I did using the boxed rosin. I’ll not ever use another rosin!