Actually, I did get a flat over the summer on my beater Raleigh but the tires on that thing are crap. Even though I do ride it quite a bit, I never really count it as one of my "actual" bikes.

The 3Wrensho is awesome and will keep you from carrying a separate tire lever.

Click the PedalRoom links in my sig for info on my other bikes. As far as tubes go, I'm not picky.