On my system (Reason 10 on win8.1) the behavier of all the knobs and faders is a little bit strange. They doen't move smooth and sometimes the position jumps. For example, when I upen up the filter to 100 it sometimes jumps back to 98 or 99 and then finally stays at 100. It's the same with the faders, like in the mixer section.
Maybe this can be optimised in an update.