They had promised that my cooling bill would be lower with a new a/c unit installation.... Instead it is now much higher on average than it was. In addition, I was without a/c almost all last summer while they worked out the kinks through may June and part of July. Len said he will stand behind it for part of this year... Little consolations for big losses, I guess. Still not happy with the increase in the power usage... I would have had the old heat pump fixed if I had known that a 14 yr newer a/c was so much less efficient.