I've used them all over the years, 13" Progressive 440s with std and HD springs, 13" Hagon Nitros, Std oroginal shocks and the Roadster ones, I sold my 05 Rocket and got a Roadster this year and still wasn't 100% happy with the Hagons.
I just did 2000 miles around Europe with 12 1/2" Fournales fitted and no way will I be fitting any other shock. They are by far the best option I have ever used. Even under-inflated they behaved perfectly, I got them working at the correct sag for all the luggage and passenger, we could not believe the transformation. Not one second of back pain, no harsh bumps, never one slight indication of any wallowing at all and that was around some fierce bends in Spain and France and some really crap roads.
Expensive but after years of looking for a good setup I am thoroughly delighted with them.
The ones I fitted are the black alloy HD ones, not the chrome magnums, the factory said they could make a set of HD alloys for the Rocket and they did, they look good in black with alloy stripes. The 6 alloy lines give a good idea of how much the shock has compressed with load and a guide to correct adjustment.
Fair enough, I did dump the Roadster in a ditch on the first day and broke my leg but the suspension was superb for the rest of the holiday. lol. Yes. I DID keep riding.