this are my reasons for not liking schulze.. None of them was replaced under warrantee..
It's not true that the schulze is smoother than the quarks. There is nothing smoother available (the MGM and mamba-maxx are smooth too)
the 9920 with the 7XL was smoother than my schulze bigmaxx combo for reasons i explained before. the schulze is a smooth controller, but it's not better in smoothyness than the quark, that's simple not true.
another VERY annoying thing about the schulzes is their reverse wait time.. Great... 2 seconds before they go into reverse.. and their service is crap/hilarious... I sent back a receiver to them, 1 channel didn't work.. the thing was 9 months old.. needed to pay 20 bucks for repair.. Warrantee? i don't think so..
That's my experience with schulze. Sorry for being so straight forward.
Like i said, schulze is a big nono. If you buy new, stay away from schulze that's my advice to anyone..