Probably no review, since the truck already rode like a buckboard and likely rides just as stiff with the camper on.
Sulastics only help with empty ride and Mrs Blanco1 thought it was rough with the camper as I recall. Sulastics don't help the ride with a significant load. If anything they add to the load carrying capability as they take weight and deflect "first" then are not performing their primary purpose once the vehicle has a load.
Coil over shocks weren't helping the situation either, unless they were needed. That and if the rear tires were aired all the way up and that 12klbs of tire capacity wasn't needed then they were adding to the rough ride.
Essentially there's a few primary things the OP could have done to soften the ride with the camper on and this was not one of them.
