Very good for on road use, took it down the canal the other day after it'd rained pretty hard, coped well in light mud but in the thicker stuff it struggled. Had one puncture while riding down 5 miles of a gravel/big pointy stones path which in my opinion isn't that bad as what I was expecting! Obviously there is a compromise between weight and puncture protection but stick to the roads and away from nails and they'll be fine!
The product is, as yet, unused; however, build quality appears good, Scwhalbe having an excellent reputation to maintain. And let's face it, there's probably only Moulton riders who sustain the market!!