I prefer the HB25CS that extends from prone (13 1/2") to sitting (27") sitting position. Where I hunt, sometimes the prone does not work because grasses are taller than the lowest setting.
ULTIMATE WEAPONS SYSTEMS
+1.
I've used one for years, while a little tall for prone I've gotten used to using it. While all true long shots must be shot prone in my book, I've taken a good number of 200-300 yd shots with it from sitting or kneeling that I would have passed had I been stuck with one of the prone-only models.