We recently purchased a 2 family house in Rosedale, NY (near the border of Nassau County, Long Island) and with the summer heat now here our tenant's central air conditioning system was not cooling. Pipe Doctor's sticker was on the unit outside so I called them. My call was answered by a very helpful woman who had me check several things first before scheduling a service call. Sadly none of those tips did anything but I was offered an appointment within 2 hours. The technician and an apprentice arrived in less than an hour and quickly got to work. The system was not that old, but it was not maintained properly. Mike (the tech) showed me video and pictures he took on his iPad of my system and offered several suggestions. About 2 hours later the system was cooling perfectly. He was very through, detailed and most of all clean and professional. Regardless of the price I will call them again without hesitation.