Unreliable. Asked for estimate but he never followed through, left us hanging for over a month going into the winter months for a furnace. He wouldn't return our phone calls and lied about sending an estimate by email.
Randy and crew installed a Wiseman propane boiler for us a few years ago, and did a great job. He's helped many happy clients too (I'm a real estate broker). When I saw the bad review I thought I should counter it with my good experiences. Nobody's perfect, but Randy has been top notch every time for me.