My corps is marching Jupiters this year. And from what i gather from the corps, the high brass is alright. Everyone in low brass is absolutely loving the Jupiters (except for the few that played on better quality horns). Of course these horns still have their issues. I play contra and the only problem there really is, is the valve aligners. They're made of plastic and the buttons screw off after a few minutes of playing, which in turn makes the valve aligners loose and shift. Everything else is great.