Overall, the work was done well. I was surprised at how long it took the service techs to clean the boiler. There were some issues with how the boiler had been previously installed (beyond Copperhead's control), but I feel the techs spent a lot of time trying to convince me to put in a new boiler rather than just doing the maintenance. It also took them about 20 minutes to turn the pilot light back on, even with written instructions.
Where I became very disappointed with their service and would not recommend them is that they proceeded to go around my home and ensure there were proper CO detectors (which there were). I was asked to prove that the ceiling mounted smoke detectors also detected CO by taking them down and showing them. I was told that if I didn't have proper CO detectors they would have to red flag my house.
I feel like they were looking for an excuse to bill me more after how long it took them to service the boiler (for which I was charged a flat rate). The tech spent a lot of time discussing the CO detectors with someone on the phone in another language.
Again, overall, they were nice guys and did a good job, but something about the experience doesn't sit well with me.