Everything was satisfactory, at first. Approximately four years later both my sister's and my roof leaked. The leakage in her roof caused her guest bedroom ceiling to cave in. Our leakage caused ripples in the drywall in our living room and wet spots in that area. My sister called the company. Tony responded quickly, inspected and located the leakage area, and patched, I guess, that area with mastic or whatever they use for that purpose. Her damage happened within the 5-year guarantee period, so there was no additional cost for her. Our damage was over the 5-year guarantee period, but Tony did come and inspect ours, also, and patched, for no cost. We have not had significant rain since that work was done, so we don't know for sure if the leaks were fixed.; we're holding our breath, as it took a couple of rainy seasons for the leakage problem to cause damage to that extent.We'll find that out, for sure, this winter. If our roofs still leak, we'll ask another company to come out and re-roof the area(s) necessary to fix the problem. Both Goelz brothers are professional, competitively priced, and personable, and my sister and I would regret causing them any problems which, being a small company, they don't need, but we would both hesitate to recommend them to friends, based on our experience.