I'm looking at either a Harken MK IV or a Furlex 200s for our sailboat. The luff is 45 feet and I have similar pricing for both units installed. I do not like the appearance of the new Harken ESP. I had a Harken MK III on an earlier boat and the white plastic bearings were spalling on the unit. Little pieces of hemispherical plastic were coming off and a couple of bearings were worn so much they popped out of the race on the lower unit. The furler was 5 years old and we were the second owners. Spoke to a rigging shop which were also dealers for Harken and was told that the black Torlon bearings are way tougher than the white bearings and also UV resistant. Sold the boat and the new boat didn't have roller furling. Wish it had but no money left after a new diesel was acquired (another story). When we had the Harken roller furler I got a wrap around the drum once (was more careful with the furling line after that) and found it exceedingly difficult to clear the jamb. Dropped the sail and unshackled the head, then anchored and played with the thing. This turns me off of the Furlex because the drum is closed. Searching the net, no one seems to have anything bad to say about the Harken MKIV but quite a few posts about unhappiness with the Furlex 200S. Having said that I believe that the Furlex 200s has been around since the early 90's so maybe there's more units out there. I would be interested about the experiences of people who own either of these units. I suspect that both are very, very good at furling and reefing headsails and that owner happiness might mainly be due to the quality of the installation.