M_Boats: Parachute storm anchors

Hi folks: Hope you are surviving this "beautiful" winter. I'm thinking of buying a parachute-type storm anchor for outings on L. Superior in my M15. Has anyone had experience with one? Getting tangled or "deflated" under use are chief concerns.It seems that there are two leading ones:Para-Tech and Fiorentino, and 6ft. would be the appropriate size for a Montgomery 15.I have been unable to find comparative reviews in searching the literature.Any ideas/info would be much appreciated. Thanks, Harry Elmslie