I had an excellent experience with Windy City Air Conditioning & Heating. I have used this company in the past and I have been consistently pleased with their service. Most recently, they did an extreme cleaning of the HVAC system and they replaced all of the worn parts. I like that they discussed everything that they were planning on doing and they even offered alternatives. I would definitely recommend the company to other people. The staff was very neat and I would use them again for another job.