Replaced my Michelins with Hankook several years ago and am very pleased with their performance. One lesson I learned which might help someone else:
Les Schwaab? installed my tires and used beads for balancing. After I left on an extended trip cross country, I checked the air pressure in one of the tires and when I finished I could not stop the air from escaping. To make a long story short, I went to a truck tire shop and found out that when beads are used for balancing, there is a special valve stem which must be used, otherwise the beads get into the valve core and it will not seal.
I called Schwaab later to complain but didn't get any help. I would think that as many tires as they sell that would know of this issue.
This has nothing to do with the brand of tire, just poor business practice.