Flat is very inconvenient to me as this is a commuting bike, so obviously I use it to work, which is a money maker. Unlike the roadies and weight weenies, I'm more interested in a few grams heavier without flat.

I can still get to work with the same time it usually takes even after the Armadillo, Mr Tuffy and Specialized thorn resistant tube, except without the 3-4 flats in a week.