I rode the Scottish with one, lasted me all week, not much use when i got home, it was pretty bald, but did the milage.
Recently nipped the sidewall on my current tyre (3 trials old), put a hole in it but didnt fall off the rim, used a temp repair to seal the hole and it was fine, so maybe the sidewalls are a little softer but importantly it stayed on the rim when down to 0psi, where as my last Mich' came off the rim in similar circumstances. (4RT/D.I.D Rim)