Lippert approves the use of the Reese Goose Box with their frames and since most fifth wheels made today have frames by Lippert, probably works on most of them. The 20K Goose Box weighs 225 pounds so it is substantial. Gen-Y also makes one which uses a rubber torsion system instead of the air bag like the Goose Box. On another forum a fellow who has a New Horizons being built said NH was going to test the Gen-Y version on their fifth wheels but the hole patterns did not match up so it was being delayed. The beauty of those systems is there is no hitch to store, whether its lightweight or not. Just a 5 pound or so ball to remove.
A traditional style hitch, an Andersen type or Goose Box/Gen-Y all accomplish the same thing. My guess is failures are extremely rare. All that matters is if you like it and are comfortable with it.