So I've always had an issue with cymbals sounding like sand and I have a fairy decent system. Oticas, Schiit Tyr monoblocks, Holo Audio DAC and pre, well treated room. The problem was especially bad if the room was cold or the system had been off for a while. Changing cabling didn't really solve it either.
Enter the Uberbuss. I finally received my order a few months ago. Wow! It instantly and completely got rid of the sand. Wasn't expecting it to do that either.
Among other benefits: bass is punchier, notes have more presence and weight to them, busy passages are more intelligible the system is more consistent throughout the day. I even some times notice bit of hight to the stage. Although no noticably change in depth or width, but that was never lacking the first place.
Overall I'd say after room treatment it's made the biggest improvement of anything!