Can't give you any first hand knowledge yet but those we talked to that have them would not haul with anything else.
Ours has just been ordered now. After overlooking the information and reviewing the posts we have deceided that the cost is a worthwhile investment for the sake of the truck suspension as well as the fifth wheel itself.
We were in Nflnd over the summer and after spending much time on rough roads, losing all glass articals in the rig, even those wrapped in bubble wrap, and cringing over several jolts we deceided that if a better method of towing was available we would look into it for our comfort as well as the increased safety for rig and truck.
Hope to have the hitch installed by the end of the month and we will be back on the road heading south in November.
Ron