There are two Tire vibration 'issues'. The first is from flat-spotting when the car is parked for long periods. This was evident with the original Hankook tires and was the reason given for the replacement by the Michelins. For me at least, this was never a big issue as the vibration was mild and it went away fairly quickly. The Michelins exhibit exactly the same flat-spotting issue as the Hankooks, by the way.
The second vibration problem occurred after the Michelin tires were fitted and seems not to affect every vehicle. In my case, I had a significant vibration at highway speeds (60-85 mph) that three attempts at
wheel balancing have not been able to cure. Other posters have had exactly the same experience. I am not yet convinced it is a tire problem either, but obviously it is related to the change in tires. My dealer put a set of wheels and tires on my car from a Genesis on their lot that still had the Hankook tires. The vibration went away immediately, which means it is not a drivetrain problem. I suspect bent
wheel rims, but this has yet to be proven. My dealer is fitting another set of new Michelins tomorrow, so we will see what happens.