I recently bought my vehicle in to check the AC my air was always cold but this year it was not. It was closing time, about 4 pm on a Friday. The head mechanic said he wishes auto parts stores wouldn't sell freon to do it yourself mech because they always overfill the systems. My system called for 1.8, it had almost 4. The system held vacuum, set in the correct amount all is good again. Thanks Amazing. Out the door for under 200.00. Now my son and I can ride in comfort!!!