I bought a 2010 Montana 347THT as my first fifth wheel. I had my bumper pull set up well and have a lot of experience towing various types of trailers. I heard the fifth wheels really towed nice! It jerked around so much I was sick of towing in a couple hours. Tried everything as far as weight transfer etc.
Bought a MorRyde pin box and.....that was what it needed! The back and forth chucking was the main problem. On certain pavements it was so bad you would have had a hard time sipping coffee! 85% of the chucking was gone, it helped other things as well. Really nice when taking off and tapping the brakes, you can watch it "absorb" some of that shock. I now have a Sanibel 3500. I has the standard pin box. It tows almost as well without the aftermarket pin box as the Montana did with it. BUT......I think it would still be a welcome improvement and I may add it later this year. For just over $500 it is not a cheap accessory, but if you cannot stand the chucking when towing it IS worth the money.
2014.5 Berkshire 400 QL