The company did all the heating, venting, fireplace, and a/c installation, as well as supplying them. The unit prices were just fine. The only unit I purchased myself was the hot water tank and all I had to do was make sure it was in the basement for when they are there. I paid for the installment which was included in the total cost of the entire job.
Since my house was occupied in late fall, I did not have the chance to test out the a/c system. And when I did that spring, it turned out between the electrician and them, they had forgotten to hook it up to the electricity panel. I called and they came to confirm the problem and it was fixed before the summer weather started.
Also, make sure you inspect every upstair vents to see if there is a cover. They were missing 4 covers in a few areas/rooms.