I selected Radon Systems because of their excellent ratings on Angie's List. They lived up to the ratings. John provided a quick turnaround on the quote and scheduling the install. I forget the name of the person who did the install, but he was professional, helpful, and gave excellent attention to the details to ensure the system was installed in a location that worked well in our basement. We are very particular, and we were very pleased with the installation. We have a digital radon meter and our radon levels have been low since the system was installed. The competing quote we had was for a more extensive system (which would've cost more), so are especially pleased that Radon Systems succeeded in addressing our radon issues with a smaller and more efficient system.