I stumbled on the following link last night and it provided hours of entertainment.The gloves are off.... Quite a pile-on backlash against Rocna and Craig Smith http://www.anything-sailing.com/showthread.php/7877-Manson-vs.-Rocna

Also learned that Manson is fighting back. They published these interesting tests http://manson-marine.co.nz/SitePages/Supreme_Anchor_high_standards.htm I'm not sure it matters; for example an aluminum Fortress would not have the same material strength of a high tensile steel anchor, and yet it has proved in the real world the anchor (of adequate size) will hold together and hold the bottom in a storm.