I recommend checking out Facnor. They are well made and if you plan to install yourself, far easier than most. You don't even have to cut a foil section. You can install without going up the mast
. Since it goes together easily, it's also easier to service
. Facnor is well regarded in Europe
but not as well known in the states.
If you are going to use a rigger, I recommend buying
from the rigger. That way , you can be relatively assured you'll have a working furler
at the end of the day. Since he or she is the single
source, it's up to them to make sure it all works.