Definite Difference
Reduce Life of Sail? I *think* (oh no) this is dependent on the condition of the sail before having it treated/cleaned. Some cleaners however, are NOT good for sails. Make sure the loft you use is a pro. Life of sail is also dependent on use. Sails used for light air cruising a time or two a month during non-winter months will certainly have a longer life than those used twice a week in heavy air, rain, passagemaking, etc. If the "Sydney" in your homeport is Sydney, Australia then sail life becomes more of an issue. If you're still in Canada, I suspect your sails will have a long life anyway, and how much life is sucked out of a sail by cleaning may be insignificant. Looking forward to what everyone else says.Whiter? Definitely!! I've seen some sails come back whiter than the boat. (I've not personally used this service; I've seen some others do it and I'm doing the same research you are.)Cleaning solvent used is my concern as well. Some folks I know use their swimming pool (with a little extra pool-type chlorine) and this works wonders, but I don't feel very safe putting my sails in a chlorine bath; I tend to wonder HOW this could possibly be good for the sail. Research to date shows it isn't.