Well worth the cost. This system was installed in a 62-year-old septic system, which only recently started causing major problems. The odor in the house we were unable to track or fix; also drainback from the field recently and toilets backing up in heavy rain. Installation was simple using the instructions on the web site. We had the tank pumped two weeks before installation. Unfortunately we had two weeks of rain DAILY following this installation.... Twenty four hours after the rain stopped the odor in the house vanished. The odor near the tank also disappeared. Final result ---after three months this product is a total success. We are extremely satisfied with this product and highly recommend this system to anyone with a failing system.