in mast furling issues?
We've had in-mast furling for about three years now and no problems. I spent a lot of time with the captain who was on our sea trial going over the operations of it, and I haven't had any issues. So if you get the boat, make sure they show you how to properly work it.
We like ours. I miss battens and there is some loss of sail shape, but I like being able to easily reef from the cockpit.