I used one for a while with SpectraVue and an SDR-14 or SDR-I/Q. I had it set up so Left / Right were tune up and down, Press and Turn moved the digits position. This allowed me to use the knob to tune in whatever steps I wanted, but I never really liked it, possibly because even using this there was still a lot of keyboard / mouse action going on. I never really got to like it, but it did work well, if I had given it more of a chance it probably would have grown on me more.
For my G31DDC and G33DDC I use the XKeys Jog Shuttle Pro. This allows for almost every function to be done without ever touching the keyboard or mouse.
T!