I got a flat my first time out with Gatorskins. It must have been a fluke, since I have not had one since. I have the same luck with Serfas Seca's. The single most affordable flat resistant tire made, IMHO. I have one set of Armadillos, but they're on a bike that has yet to see any serious road time. . The sidewalls of the Kenda Pro tires on the Trek 510 are beginning to dry out and flake. Otherwise, they have been great tires (with thorn resistant tubes of course) I am debating Armadillos or Pasela tourguards for replacements. I want something with a tan, or beige sidewall, to keep a vintage look. I have heard SCORES of praise for Pasela's on wet pavement, so that may be the choice. If I can find skinwalls in 700's. I have noticed a blackwall version, so I fear the skinwalls may be getting phased out.,,,,BD