J.M. Service Company, LLC

Two five-star ratings, two one-star — that's the entire public review record for J.M. Service Company, a commercial air conditioning and heating outfit that's operated out of Braintree since 1999. The company's own site describes itself as a mechanical-systems shop built around repairs, installations, and maintenance contracts, run for more than a quarter-century. Beyond that four-rating split on Google — echoed exactly on an HVAC directory site, so it isn't a second independent account, just the same handful of ratings surfacing twice — there's no dated, recent customer story to point to. No named customer, no described job, nothing to show what a job with them actually looks like lately. It also isn't accredited with the Better Business Bureau, which has no rating on file for it. And its own materials frame the business as commercial-facing rather than residential, so it's worth asking upfront whether it even takes on homeowner jobs before calling. This is a long-running business with almost nothing to check it against — the smart move is a direct conversation about scope, pricing, and whether they do residential work at all, rather than leaning on a review count too small to mean much.