I first discovered Integrity Heating and Cooling when my A/C broke last October. I found them on Rosie on the House's referral list and was really impressed with the customer service. It felt like a small shop, where Shelby, who took my call also checked the work order when the service tech returned.
When I ultimately had to replace my A/C, I called around and got a few quotes from places referred by friends and coworkers. I wound up going with Integrity because I appreciated their responsiveness and their willingness to come darn close to matching another bid... AND gave a longer, better warranty. Plus, they had 0% financing.
I would absolutely recommend Integrity!