Amazing customer service. I called them 10 months ago to fix the water heater vent that the pervious owner of the house attached using duct tape. To fix it they attached it with screws instead. That held it in place for about 10 months until for some reason it fell off again. I called them and they came same day to attach it again for no charge! In the original work summary it said that they guarantee their work for 1 month but apparently they guarantee it for much longer than that. I am a little bummed that the vent fell off in the first place when they secured it with screws but I am giving them 5 stars for fixing their mistake for no charge.