I have the Harken Main sheet rig on my 35' sailboat.
The traveler is mounted forward of the companionway and is level, which is nice as the mainsheet set does not change as you spill with the traveler.
It still needs the winch to pull it in or tighten it. There is a lot of line in the cockpit ( I bag it). I am not a racer so my adjustments are not fast. I have not had any issues with twisting lines.