I own two Bogs and am looking to buy a third. The original death grip is amazing, especially if weight is not an issue. I have the Carbon Fiber death grip and it is solid as a rock. My son used it to kill his elk this year at 520 yards....and he 10 ringed it. We have used it in our ground blinds for turkey and deer season for the last 6-7 years and again.....AMAZING. Only negatives....Weight, only operates on two plains and no arca rail.
Two years ago, I bought the Sherpa with the death grip attachment. It is significantly lighter and has a ball head for three planes of adjustment. It will not work for standing shots and is not as stable as the death grip when fully extended. It really excels for seated positions and packing. It has the arca rail that the death grip attaches to....giving you options.
The next one I will buy....likely this year....Death Grip Carbon fibre Infinite. Best of both worlds with a ball head adapter, arca rail, death grip, standing height, etc. Only negative will be the weight.