I've been using Wolverine Heating & Cooling for years, and they always show up when they're supposed to, they do what I expect them to do, and their prices are right. They recently did a customary check-up of my furnace to make sure it was running smoothly, and everything was fine. Their technician was pleasant, professional, and courteous. My family used them for years before I started using them, and I will continue to do so.