I had one on my first boat. Roller reefing mainsails are worthless. You get a poor setting sail with a baggy middle and tight leach which is just about the opposite of what you want. The tight leach will stretch the sail out of shape effectively ruining when sheeted in hard. You cannot use a vang or other boom hardware
when reefed without special fittings that will wear holes in the main in typical open ocean use. Rolling in a reef is a time wasting pain that requires that you be at both the tack and clew at the same time while reefing to get the least poor shape to the reefed sail. The tack of the sail, bolt rope
and slides will build up around the gooseneck as the sail is reefed. Makes rolling in a deep reef nearly impossible.
Slab reefing is quicker, has less mechanical failure possiblities and produces an optimum setting sail for high wind
conditions. Have some reef points put in your main, install a couple of cheek blocks on the boom and forget using the roller reefing boom.
35 formerly with a roller reefing boom.