I have one...
I bought the boat used from a charity and had a problem with the FF4's drum coming out of the hub. I even called the manufacturer because I figured something was configured wrong. They had no answers for me, although in general they were knowledgable and friendly.Long story short, some the the optional bearings came out. The manufacturer said the best way to have them replaced was to send it back to them. I haven't bothered because once the previous owner pointed out that there was a retaining pin missing I had no problems furling even with the missing bearings. I don't know if I'd spend the money on them myself based on that, if they are over $100 more (I don't know the cost). My boat is a 25 foot Lancer.My FF4 is older, but unless they changed its design I probably wouldn't buy one if I planned to change sails often. The integral halyard is a skinny little piece of line that runs down a channel. If there is any kind of wind or strain on the system it is a royal pain to get even my tiny 110% genoa to full hoist. It is just tough to get leverage on that tiny line...especially if you are in bad weather already trying to swap a headsail. Forget it. My Wife and I put the jib up last year with a 2-foot swell and it was hell. Once it is up it is fine. The other thing is that to lower the sail you need to tie a line to the thin halyard line. I don't know if there are better options, but when first bought my boat I did this in a hurry (lack of experience) and we had a blow a few days later. The lines twisted around a shroud and separated leaving me with the joy of dropping my mast on the water to retrieve it or going to the top in a bosuns chair. Neither is fun.Perhaps owners of other systems can chime in. In total...not bad for the money...but the FF4 has its built in frustrations and limitiations.Bob