Great paniers. I had Ortlieb panniers before and they lasted for 12 years with heavy use. I hope these will last as long if not even longer. The built seems of same or better quality. I appreciate the fact that they are much bigger than my previous paniers and hope that will reduce the tension on the seams (weakest points in my previous panniers - the seams tore apart due to heavy loading). I have been using them for a week now and so far so good!