The Continental Travel Contact Semi-Slicks were my previous tires before the T-Servs that I am running now. I had about the same luck with flats due to a glass fragment penetrating the Kevlar every 500-700 miles. I think this happened three times or so.

I bit the bullet and ordered some Marathon Plus tires. I am not fond of the idea changing a flat at 20 deg F in the dark. If nothing else I might run the T-Servs in the middle of summer when flat fixing is less challenging.