Sorry to dig up an old thread but wanted to add my comments. I tried Michelin Power Competitions based on the BRR review. Both front and rear tires suffered sidewall failures in the first 30 days. Going back to Continental Grand Prix 4000S II. They are certainly my go-to tire.
same as my experience, 23c Power competition doesn't last more than a month.
I currently using Vittoria Corsa G+ which seems to be plushier through bad road which i suspect that it may also be faster on bad road as well since i'm not bouncing around as much. But then again Conti still roll well at lower pressure so i'm not sure about Conti at lower pressure vs Vittoria at normal pressure on bad road.
I can't really speak for the Michelin Power, but can for the Michelin Pro4 AND the Conti's.
Just last Saturday went back to the Pro4 in 25c size. Far superior ride over the Conti 4000sii. No contest.
And no need to employ a hack like everybody running their Conti's at low pressures to compensate.
With both running at 105-110psi, the Conti's feel harsh. And forget cornering, too, as the Pro4's smoke 'em in corners.
Oh, and the primary reason for me changing back is the 2nd catastrophic sidewall slit failure on the Conti's.
Never experienced that over many years of Michelin iterations.