The Lupi can cause chaffing, as can the Gentle-Leader, however the Gentle-Leader can be ordered with soft pads to avert this. The Mekuti Harness is meant to stop your dog from pulling and can attach to two leads. However this leash is also associated with trainers who will yank on of the leashes from behind the dog, while the owner walks beside the dog, which I do not support. If the Mekuti is kept to one lead, attached at the FRONT of the body on the harness, then it is more effective and can be used for dogs who pull. The Yurkiw Harness is meant for tracking/protection dogs and can also attach a lead to the front of the harness. Because there are many loops to attach the actual lead to the harness, I would not recommend this harness to someone not using their dog for a working purpose.
If you do use it for similar purposes and your dog pulls you, just attach the lead to the foremost position on the harness (in the front).
Stick to the simple leashes and you will usually only have simple issues :)