Bought a sleeve for 350.. and for three summers its never worked right...
When are told him he never got back to me..just took my money and didnt care after that.
He sold me a refurbished air conditioner (in the middle of a major heat wave) with delivery and an excellent installation job for under $400.
One word of advice... if he asks you to do anything in preparation for installation, ask questions. Make sure you clearly understand what he wants you to do - otherwise you might find his customer service skills a little lacking.
Having said that, I wouldn't throw the baby out with the bath water. Do I recommend his service? A definite "YES"!