I really only use this type of snubber when preparing for bad weather on a mooring, or when on short scope in an anchorage. This past summer I was on a mooring in Boothbay Harbor with the approach of Hurricane Earl. The picture is not very clear, but you can just see the attachment point below the bobstay chainplate. A second use is in a tight anchorage, if I want to use short scope. I normally do not leave this snubber permanently attached and rig or remove it from the dinghy. Underway it rattles, and it just looks sloppy.

My usual snubber is a two-part bridle attached to a stainless steel plate with a slot in the center that slides over the chain. I believe it is an ABI product. My concern with a snubber attached to chain with a rolling hitch is that when you have to put out more scope, or raise anchor under deteriorating conditions, it takes time to remove, and needs fingers too close for comfort to a potentially jumpy chain. With the two-part bridle I just raise chain until I can reach the ABI plate, lift it off and pull it over the pulpit, then I can let out more chain, or raise the anchor altogether, and re-use the snubber or store it later.