Charles H. Mullenberg Company, Inc. offers plumbing services with mixed reviews. Some customers felt overcharged and wished for more transparency regarding costs before service. They expressed surprise at high rates, which were deemed excessive for the work performed. Conversely, another customer praised the company for a positive experience, highlighting a quick diagnosis of a toilet leak and a successful upgrade to a new toilet. The technician was described as pleasant, and the pricing was considered reasonable. Overall, while some customers had concerns, others found the service satisfactory and worth the investment.