I hired Dollarwise five years ago to install a back water valve at my property line as well as some miscellaneous plumbing jobs around my home. The first red flag was when Frank (I believe is the owner) demanded full payment upfront. In my experience, no reputable contractor will do business in this way. The most they should ask for is a deposit and possible progress payments. The technician working in my home on the miscellaneous plumbing, went through my home and helped himself to my tools and other supplies like duct tape without asking. I found it odd that he would not have all of his own supplies. The largest problem by far was the back water valve. At the outset of the project, it was agreed that Dollarwise would provide all supplies and remove any waste materials after the installation. After installation was complete, they left my valve access stack without a proper permanent cap and a large slab of waste concrete from the excavation on my property. When I asked Frank about the concrete he said that I could use it for a pad for my garbage bins. When I reminded him that they had agreed to remove the waste, he begrudgingly took it away a couple days later. When I asked him about the permanent cap, he said that I didn't really need one and he never returned to install the proper cap. Only five years after installation, the valve had sunk so badly that the sewer line was no longer aligned with it at the opening or exit. This caused chronic sewer back-ups into our basement (the opposite of what a back water valve is intended for). The city as well as the contractor I hired to fix the job agreed that it was the worst installation they had ever seen. Dollarwise should have braced the valve with something (like concrete) to prevent sagging. Moreover, the reputable contractor advised me that during the Dollarwise install, they failed to recap my water CC valve (next to the back water valve) during the excavation. As a result, the CC valve was filled with dirt which would be problematic if the city ever needed to access it.