It took us 1 1/2 years to find a landscaper that could and would install the engineer recommended system. Finally, a local, reputable gardening center recommended Kemora, which was the only firm, of the few that would respond, that seemed to understand our problem, take it seriously, and had experience installing systems that would solve it. They were willing to and did work with our structural engineer to ensure that their proposal was consistent with the engineer's. The engineer slightly tweaked and approved Kemora's design. Kemora kept to the appointments and provided an accurate estimate of effort and materials. They provided us with recommendations re permeable paver choices and paver design and with information re warranties and ongoing maintenance. They installed to design with one exception. During the project they determined that a surface drain included in the estimate would send yard waste to the catch basin that probably should not go there. They decided on their own to substituate a swale for that catch basin and then let us know, with the proviso that if the swale allowed rainwater to pool on the patio, we could call them and they would install the surface drain. We have experienced several heavy rains over the past 2 months and all have been handled well by the new gutter, downspouts, and drainage system. For the first time in over 3 years, none of us has had to stand under the back stairs in the middle of the night, for hours, bailing water in sometimes unsuccessful attempts to prevent flooding. What a relief! (Picture below shows the drastically reduced amount of storm water flowing into the exterior basement drain.) The new patio and sod instantly provided great improvement to the looks of our back yard, so not only did Kemora know how to propose and install the right underground system for us, they knew how to install aesthetically pleasing solutions for what covers the system. If I have recommendations for improvements, they are these: - Communication during the project needs some tweaking. The person supervising the work often came in the afternoon, which meant that if the crew had any misunderstandings about the design, the misunderstandings would not be caught until several hours later. There was one such incident that I happened to catch early and correct through text messages so that the work did not have be done twice. The weather was not our friend on this project, which pushed the finish date back, but the effort was also underestimated, so the project estimated at 2 days, took about 5 - 6 days, not counting weather delays. This did not hurt us except that we were coordinating day parking of Kemora vehicles with a neighbor's parking lot and the extra, unplanned days of vehicle parking dance were beginning to annoy them. - We were grateful to Kemora for their work and wanted to pay them on time, but had to work through several iterations of the invoice to arrive at the correct list of parts, which we need for proper warranty coverage. Kemora had always intended the correct list, and were always responsive to making the corrections, but in future just need to pay greater attention to the paperwork details. Again, we are so grateful to have had Kemora's assistance, expertise, and resources provide us with the first collective peace of mind we have had in years!