I used to have a Danforth and it always seemed to work well in east coast mud until one morning I woke to find myself half a mile further up Pyfleet Creek than when I anchored the previous evening. I can only assume it broke out on the turn of the tide and took half a mile to reset.
I have not used one since until we chartered from Palermo last year. I did not notice at takeover but one of the flukes was slightly bent and it proved to be almost impossible to get it to set. When we got back I checked around the marina and nearly all the boats were equipped with Danforths and about 50% had bent flukes. I would not dream of using one any more except perhaps as a lunch time kedge.