I think its a waste of money. You will do better to get a solid and sound weight distribution system, like the 4 point Equal-i-zer or Curt, weigh the tongue of the trailer with the camper loaded once and you will be good.
I can see where this hitch would be useful if you are using a utility trailer, or multiple utility trailers that carry multiple types of loads and you want to check the actual tongue weight with every load and trailer you transport. But if using the same trailer, and you have only 1 trailer, it's loaded pretty much the same way every time you hit the road. Oh, you may travel with full tanks and full propane tanks, but if you weigh the trailer with everything loaded, you know this will be the max it will ever be. No need to weigh again and again and again. It's a waste.
Very good idea for those who use multiple trailers and carry multiple weights of loads, but a waste if you tow only 1 trailer and it's always the same trailer.