The Protocraft couplers are great but I will stick with my Kadee's. Thanks Ed for the great article! I love the way these magnets work out for you, I'll do the same. From an operational point of view there is simply this decision wether or not you are willing to reach in and use your hands to uncouple. I don't like that concept, I think it's nice to have a clever concept of where to place the magnets and decouple there.
Actually you use a wand with a magnet on the end to uncouple the Protocrafts. What turns me off with the Kadee is their trip pins, which look as much like an air hose as a garbage truck looks like a Ferrari.
It's all what you like!