We converted a wood burning fireplace to gas (we went with a Valor gas insert), which required extending the gas line outside, along the house. Our initial meeting wit the sales expert was very informative and reassuring, we felt he understood our concerns for a high-end finished product that didn't look like a retrofit. John and Derek, the installers, were excellent - very polite, attentive to details, and didn't damage any of the property while doing the job. The whole experience and finished product exceeded our expectations. We would highly recommend Marsh's.