We think this anchor is the next best thing to sliced bread! It sets immediately and holds in almost any bottom, including thick kelp. We like the SPADE so much, we now have a 120lb as our bower anchor and a 66lb as our secondary anchor.
We also had a great deal of difficulty anchoring when we first arrived in Norway–the *** we had as primary anchor just could not set in kelp, hard clay or hard sand. When we switched to the SPADE as primary anchor, however, anchoring became a joy again.