Overall, the service was excellent. Reliable provided a free estimate promptly. They offered to install an 82% efficient boiler to replace our old clunker. To do the actual installation, they sent an old guy out. He took his time, but did a top quality job of installing the new boiler. He called in a venting guy to take care of some complications with the venting for no extra charge. Reliable took the old boiler away. The old guy took his time to show me how to purge air-bubbles out of the heating system, it's really easy, and something that you really don't want to keep calling a contractor in to do. A week after the installation, one of the pipes started leaking at a joint. Someone came out immediately to take a look and tightened up the pipes, no extra charge. Since then, no problems whatsoever with the heating system. I highly recommend them.