I've got the 5100's for my F150.. Love 'em! :)
So far, they have a bit firmer ride, but when going over bumps and pot holes and speed bumps and the like, it's far smoother then the OEM shocks where when they were brand new and going over those same things.
Yet, it's still a smoother ride overall.. Can't explain it.. It just seems smoother overall, yet firmer... I know that makes no sense..
It just seems to soak up the bumps better now. That's the only way I an explain it..
Good luck!
Mitch