Rivendell says Schwalbe tires last a long time & don't get many flats. One of my high mileage touring buds can vouch for both claims. He got these for Christmas 2012, and has had 2 flats since then. When the blue puncture protection belt started showing thru one, he decided they'd earned their keep. The outstanding performance motivated him to get another pair of the same tire, bumping up from 26 x 1.5 to 26 x 1.75 size. He keeps accurate records of such things and says these have 25,000 miles on them. I've known him for a number of years and don't doubt him. YMMV.
Pictures prove they're worn out:
https://www.flickr.com/photos/33786397@N03/sets/72157647503088443/In the shot with my feet in the background you can just make out a spot of the blue belt starting to show. It was worn down to that point at a few places around the tire. Schwalbe's website lists the 1.5" width at 870 grams. We weighed a worn out one at 825 grams.
dougP