Quick update on my 28mm Michelin Power Road TLRs - I'll be at 3k miles on them within the week and, while it's starting to square off, the TWI dimples on the rear tire are still visible. I'm expecting at least another 1k out of them, but wouldn't be surprised by another 1.5k. Either way, this is pretty impressive longevity for me, I'm usually playing chicken with the cords starting peek out in the 2.5-3k mile range.
Still rolling nicely/easily. I've found the best comfort for them is a little under the -/+60spi that I had been running with the Pro One Evo Addix, though their comfort still falls a little short of that of the Schwalbe (I'm around 180lbs and am running these on 23mm int width hookless Zipps, for reference).
Oh, and I had taken one big puncture that required a knotted bacon strip plug a while back. I decided to leave that plug in place, rather than patch internally, just out of curiosity. It's still in place, 2,500 miles later. I'm comfortable with saying that it was a permanent fix.