I got close to 9000 miles on my Mefo rear on my just completed South America trip. Not wanting to earn a trip to a third world hospital, my right wrist was more restrained than usual. It was primarily pavement with less than 1000 miles of dirt roads. I liked it.
I used a TKC 80 front and it was okay while it lasted but it cupped and was handling funny at about 5000 miles. I've since been told to reverse the tire at each oil change to even out the wear. I don't remember my partially worn Pirelli MT21 cupping like that but it did have less miles.
I have a couple new 908's in the garage which I still think are better in really technical stuff but for longer trips, I'm sold on the Mefo Super Explorer rear.
KTM 950 SE, KTM640 ADV ( Hibachi, risen from the ashes)
KTM520EXC (broken), KTM 400XC (the replacement)
Honda ST1300 ABS (newest addition to the stable)
STOC #326 IBA #217