Anybody use the Curt Ram factory prep 5th wheel hitch?

I have the curt Q20, find it a very well built hitch and easy to maintain. To me its a great hitch and the one to get.

To shed some light onto the post by dutch. I have found for the jaws of the hitch to fully close and lock, the height of the king pin has to be right on. Yes this may require getting out to raise or lower the unit so the king pin will be at the correct height. To me although sometimes a pain I feel better knowing that it takes more perfect match to lock.