I do not have first hand experience with Furlboom but spent time speaking with them at the Annapolis boat show. A friend had a different furling system (I don't remember which but it was one on the major players) on his 45' sailboat and had nothing but problems. The sail would not roll properly and would lock the unit where you could not lift or furl the mainsail. The device is very sensitive to the position of the boom and bend of the mast. Very small changes in either would stop the main from rolling into the boom and would bunch the sail in such a way to prevent any rolling up or down. He had a mainsail made per specs provided by the manufacturer and had the sail re-cut a few times with little success.
I spoke with Furlboom about the problems we experienced on our friend's boat and they had good responses on why their unit is different. We are going to consider Furlboom for our 44' sailboat.
Yachting Systems of America,YSA Furling Systems, LLC
I am not affiliated with Furlboom.