My AC system had a leak in the copper lines between the coil and the compressor unit. The reason for the low review is because Around the clock stated that copper lines in the house are in good condition and do not leak. It turned out there was a very slow leak in the lines. I paid $3200.00 (between 2 repairs) to fix the lines. Had they replaced the lines during the original installation these repairs would not have happen. So I can't recommend them too costly repairs to a poor installation.