Whenever I evaluate a puncture-resistant tire, I compare it to the Specialized Armadillo, the standard by which all other puncture-resistant tires are measured. The Armadillo will survive World War III but is heavy and rides like the wheels on a Flintstones car. These tires are as tough as the Armadillo but have a more supple ride than even the lightweight Bontrager Race Lite Hardcase tires that they replaced on my bike. Claimed weight is 340 grams vs. 335 for the Hardcase and the price is $5 more. They also have a folding bead, unlike the Hardcase and Armadillo which are both wire. Finally, they are pretty easy to get on the rim as long as you use at least two tire levers.
I ride on some filthy, crappy roads that never get swept and are littered with debris including lots of glass. In a year and a half of commuting 5 miles a day, this tire has punctured once, caused by some kind of sharp metal pokey thingy. With my Hardcases, although they were quite tough, the outer tread got really cut up over time. On these it's still mostly smooth.
I'm still satisfied with the Armadillo on my 26" commuter bike -- where sheer puncture resistance matters above all else -- but on my road bike, it's Durano Plus all the way.