Attached are some pics of my sails after the Sailcare treatment. New zipper was $50, cleaning and re-resining for the jib was $50 and $100 for the main. They repaired the clew of the jib, where all the stitching was popping, repaired the chafe from the shrouds, this kind of work was about $40 an hour.
They look great. The chafe was really bad on the starboard side, and non-existant on the port, thus the white repair panels.
Stiffer sails are flatter with fewer wrinkles and hold their shape better. It probably makes less a difference with full batten sails, but on the club's Lasers and 420s, I found stiffer/newer sails were noticeably better performers.