Can anyone tell me about the quality and reliability of a Trane XR 15 Heat pump? I am considering installing one for $5100 in order to get the $1500 tax credit.

Is that quote for a complete system, or outdoor unit only? Trane has made some good strides in their outdoor unit products. I like the serviceability of their newer cabinet designs, and placement of the reversing valve on heat pumps is great. A pretty solid choice.