Here is what I have learded. Take it for what its worth. They are a lot of work. Require much tending. I think less problematic for slow trolling live baits, but I prefer fishing 6-8 knots and they are tough to manage at that speed. I've tried planers rather than downrigger weights and like them better. Also, I prefer outrigger style clips on the cable as opposed to the downrigger clips with the pads as its tough to haul a bait with any resistance like a Braid or Yo Zuri with those padded clips. Might be ok with a more aqua dynamic lure like a tuna bait.
It can be a challenge to manage the bow in the line between line tip and downrigger clip, but I try to keep that ar a minimum and run the baits back about 30 feet behind the cable. You have to watch regularly for weed buid up on the cable or trolled bait.