I have always had great luck at stacking at London Drugs! Some of the brands I have had no problems stacking coupons with are Tresemme, Dove, Neutrogena, Clean & Clear (the body wash is free if you wait for a sale and combine the $3 printable with the $2.50 printable from healthyessentials), Shick, Revlon, Clorox, Energizer, Advil, Tylenol, Centrum, Pediasure, Johnson's, Skintimate, Playtex, Arm & Hammer, Colgate, Cascades, & even Nicorette for anyone who wants to quit smoking!
Yes they are a bit stricter with their rules but that's probably a good thing! Maybe if SOF regulated coupons more they wouldn't have put an end to stacking. Keep in mind you cannot use LD's store coupons with your own, and some locations don't allow printables over $3, but the one I go to is great, so call and find out what your stores individual rules are first :)

