My new driveway looks terrible and after many calls their was no response they simply dont care. My contractor installed the paving stones properly and we were told the discoloration would wear off in 6 months. We waited over a year and had another contractor come in to chemically wash the driveway and the discoloration simply would not come off. Repeated calls to customer service at Cambridge Paving Stones lead to a person who visited our home and told us we should have the stones cleaned if this was there answere to the defect in their stones, after we had the stones cleaned there was no change and we have been ignored ever since.