I have those on my touring bike. Well, on my touring bike wheels - the bike itself is no more.
Compared to the previous model they roll well, and are surprisingly good on mud (though obviously nowhere near as good as a MTB tyre), but a liability on leaf-slime-coated tarmac. I get an average of one puncture a year (usually from a screw or hawthorn or similar - they seem to cope with glass pretty well), which I consider to be a decent tradeoff against the harsh ride and heavier weight of the Marathon Plus.