My install was a replacement install for a septic assist disposal. It was a Insinkerator as well and last 19 years. I was very pleased with it. The Evolution model was very easy to install as it fit my old sink adapter. I am very pleased with the new one after 2 months. The Evolution model is so quiet. Much quieter than my old one. With the Insinkerator quality I expect the new Evolution model to last for many years. I highly recommend the Insinkerator brand.