I chose Woodall Air Care to come out and install a new A/C system in my home. The problems started immediately. Usually, when the unit would "try" to start up, it would make a series of knocking sounds. Sometimes after the series of knocking sounds the unit would come on. Sometimes it would have to go through several cycles of knocking sounds before it would come on. I have counted over 25 knocks in some of these cycles and I was awakened every night by them. Also, when the unit would cut off, it would make a strange braking sound, which I was told was normal. I didn't like the sound but I could accept the possibility that it may be within the range of a normal, albeit obnoxious, sound for a new type of motor. The knocking sound, however, was ridiculously outside of the range of sounds that any consumer could find normal or acceptable.
I repeatedly contacted Bob Woodall Air Care regarding my concerns. When the technicians came out, the #%$@ unit would not make the knocking sounds! They just kept explaining to me how it had to spool up to start and then brake to stop. I clearly understood that, but, what I was describing was something else completely. Then to add insult to financial injury, they told me I was just "overly sensitive to noise." Finally, it made the knocking sounds when one of their technicians was here. He got on his cell phone, called somebody and said "It sounds like someone is trapped in the closet knocking on the door to get out." Hallelujah, at last they heard the knocks and would fix the problem! NOPE. They installed a new motor, which made less frequent, fewer in the cycle, and quieter knocking sounds but still was not normal. I was so exasperated that I finally just lived with it.
UPDATE 5/29/13--
In August of 2012, after being notified by Angie's List, that they had received a negative review, Bob Woodall Air Care called me to apologize for my dissatisfaction. They informed me that those particular motors, while efficient, were not practical because of the noise that they made. I do want to make it clear, that in no way was the loud knocking sound it made, sometimes 25 times or more, a noise that could be considered normal or acceptable in any reasonable person's book. I am not overly sensitive to noise, as was suggested by their technician. This remains the only negative review I have ever posted.
They were polite and made an appointment to install a new motor. After several months trial period, this one has not made a knocking sound and I have not been awakened intermittently during the night as I was before. I have had no further issues with this air system. I am glad that they eventually made it right, although, I regret the stress I endured having initially felt ripped off and then insulted. At least I no longer have a sick feeling when ever I see a Bob Woodall truck.