We had our old asphalt driveway and carport slab redone by HD concrete last year. It's been just over a year and I already see cracks on both the driveway and in the carport. One issue I had at the time was that during the day of the install, I saw the workers not propping up the rebars sitting flat on the ground while they were pouring. I had to phone Matt and had them go back and lift the rebars from the ground. I believe the rebars should have been set on a block which was not done. On top of that the final thickness were less than the promised 4", some spots or barely over 2". While I understand all concrete can crack eventually, I do believe they skimped on both the labor and material.