I have the Rubino Intrepids (not the pros) on my road bike and on my fixie. So far between the two I've only had one flat. Looking at the rear wheel of my fixie I can see 6 or 7 deep punctures in the tire, but clearly only one of them went all the way through.

Both the intrepids and the pros are kevlar belted and flat resistant. The only difference I'm aware of is a) the pros are folding tires (kevlar bead) and b) the pros have a higher tpi (I think 2x as much).

If you are looking for a cheap flat-resistant tire, the Intrepids are really nice. The Pros will "ride" a little nicer because of the lower weight and higher thread count (at least, I assume, I've never used the pros) and still be flat-resistant.