As the title says I have been using these lenses for nearly fifteen years, without a single problem or eye infection (touch wood). I have taken part in kick boxing tournaments, played rugby, lacrosse and gone water skiing without ever loosing a lens. Even after extended wear in dry conditions they still feel as comfortable as when I first put them in. I can't recommend them highly enough!
I've been using contactlenses for over 25 years, Acuvue 2 since they were first introduced to the marked here in Denmark. Every now and then I've tried out other lenses, but I've always returned to Acuvue 2. There are room for improvement but at the moment I haven't found the lenses that over a period of 2 weeks or more are better for me. I do recommend that you always try out new lenses at least for 2 weeks.