Tom the plumber arrived on time, and completed the work in about 1 hour, as he had estimated. He supplied the replacement disposal at a price ($90) comparable to the best price I could find from any plumbing equipment supplier on the internet, which was about 30% below retail cost for the unit I selected. Labor made up the remainder of their charges- so about $150/hour for the plumber. That's reasonable for someone who knows what they are doing. In the past, I've had ''children'' show up to do a job I've arranged with an established service company. He seemed very experienced, skillful, and cleaned up after himself. Tom also answered my other plumbing questions about tree root invasion of sewer lines and a one-way float valve in a basement drain. I highly recommend Zell Plumbing for any service calls (if you can get Tom to do the work).