Customers most agreed on the following attributes:
Picked this up to go with a new D300 - wanted something that helped a little with the weight. I was pleasantly surprised by the way the shock absorbing design made the camera feel lighter. Would like to be able to shorten it up another inch or two but otherwise a great product.
Elastic give is helpful for comfort even with heavy camera, yet firm enough to avoid bouncing. Only improvement necessary is to add non-slip surface on underside of strap so it can be more stable when worn on outside shoulder.
I shoot in the mountains frequently; mountain biking, landscapes, skiing, etc. Being able to switch from my Boomerang strap to the backpack straps with the same camera or switch between cameras with the quick-release buckles is a life-saver! The comfort of the neoprene neck padding is great for a long carry as well.