I kinda like the one I have on the rear of my road bike, but it doesn't get as much use as my fixed gear, so I don't know about longevity. One poster here called them the "sh*tiest tire ever" or something to the effect, but I can't recall who or where. One thing I have noticed is that it takes considerably less effort to skid on them, which probably means they're made from harder rubber, which in addition to reducing rolling resistence, increases their durability. At least I think.

And they're dirt cheap.