Just a great all around tire. Less puncture resistant than other Continental tires. There is some added weight but well worth it especially in the winter with all the cinders and salt on the ground.
I'm a big boy, 6'7 240 lbs. and it takes a lot of tire to hold me up. The Schwalbe One rolls, with a latex tube, better than any tire I have tried. Conti 4000s II tires casings give out before the tread goes, but these are staying round wo bulges so far with about a thousand miles. The biggest thing is the ultra low rolling resistance. They are amazingly fast.
Road cycling is what I live for. I need to have confidence under my bike to ride my best. These tires give me the confidence I need to smoke the competition even if its just me going for the latest KOM. Sure footed, puncture resistant and well fitted tire that will give you many trouble free miles.
I commute to work everyday throughout the year. The last thing I want is to have to fix a flat on the road. These tires are extremely durable and resistant to punctures from glass and road hazards. Not a light tire, but they roll pretty well. When you catch them on sale, you can't beat the price.