I bought a brand new AC and furnace a while back from a comfort service. At the time when the company installed the furnace, the sales guy M told me he will offer me a free filter and one free tune up after the installation. But when I called them recently for the free tune up, the owner and sales guy told me that they did not said that before. They are very unhonorable business – please avoid with all cost. There is also a funny story about the sales guy. One morning he visited my house. (I forgot why?) He just opened my front door without knocking. I forgot to lock the front door the night before and my alarm system made a really loud noise and woke us up. Who on the earth do that? I had to buy a new smart lock because of the incident so that I can get notification every time the door is unlock for too long. When I tried to talk to them to figure out solution. The owner encouraged me to leave a negative feedback on internet. I normally don’t leave reviews, especially bad reviews, but if this is suggested by the owner, I should honor his ask even though he doesn’t honor his promise to me.