I had to have the Leica HD-Bs as soon as they were available. The integral ranging function worked well, but I really did not care for the whole package.
In Wyoming last year, I sat in my truck while my buddies were putting the stock on a herd of speed goats. I watched the whole thing unfold and was switching back and forth between the HD-Bs and my older Swarovskis (both in 10x42).
I decided to keep the Swarovskis. I have never tried the Swarovskis with the rangefinder, other than at the SCI show, and that was indoors.
donsm70