I go SRT whenever possible, but will go MRS sometimes if im gonna be limbing out a big conifer for long periods of time, or if I'm chunking down logs in a super pitchy Fir or Pine.
With the DdRT configuration in the picture it basically functions like a Hitch Climber setup. Pull on the tail and the system instantly moves up the rope. Once I figured out how to get the HH2 to perform like a HC setup in DdRT it was game over, as I realized this one little tool could do everything I needed a device to do, and do it in a super compact, super smooth, bulletproof fashion.
The HH has become my absolute favorite tool. In big conifer removals I simply run it SRT in a stock configuration. When I need to go DdRT I run it as pictured and it performs flawlessly. If I'm in a tree that spreads out a little more I will run it SRT with a pulley underneath it. This little chunk of steel kicks-ass in all these scenarios and all it takes is a second to change to the proper configuration for the task at hand.
I would encourage all you folks with HH2's or HHX's to try running less wraps on your device and see what it does for you. I run mine with a 3 wrap HH hitch, or a 3/2 VT with the legs loading over the bone. When dialed in both tend almost as nice as my Rope Runner, grab instantly, a have that feel that only a hitch based system can deliver.