I have an older house with remodeling done by the previous owner. The surface of the kitchen remodel looks great. The inner workings of the sink were a disaster. Finally the cheap garbage disposal quit. Felix Plumbing came in, put in a more effieient disposal, and replumbed the drains. What a delight, the drain actually slopes toward the sewer line and there is twice the space under the kitchen sink.
Thank you Felix Plumbing.