I hear that Profurl has a good reputation for durability, and a design that prevents halyard wrap, which was a serious & consistent problem that I had with my Harken Mark III model. The Harken came with my previous boat, an S 2 racer, & despite their marketing Harken products for racing, I don't consider them tough or robust in design. As a matter of fact I believe that I referred to the harken furler that I luckily no longer own as "A piece of CRAP!" It jammed constantly, whenever U really needed it to work in any kind of high winds, despite having it adjusted, wrangled, strangled & finally given up on by more then a few competent sailors & riggers who worked on it with me. My current C 30 has a 20+ year old HOOD furler that runs smooth as silk. Fexible Furlers are also cheaper in price & used by Catalina, but U get what U pay for.