Well I've been with the Ballistec's for about a week, breaking them in on a treadmill. Today was the first time for tennis. Was out there for about 2.5 hours. Near the end the side of my left foot started hurting--so much that it affected my gait. Not sure what the problem is--they could be 1/2-size too high, but then I'd expect my right foot to also have the same problem. I bought them because they were very stable and I have a low arch (Barricade 6.0s were too high), but other than that, I have normal wear patterns on all my shoes. Anybody else have the same problem--pain on the side of the foot? Trying to figure out if I should get another shoe or if this is just a break-in period.