From all I've read on here and other places its bulletproof (correct install, of course).
I would not be anywhere south of mason dixon in July/August/Sept w/out air.
Have you also considered Houston's own Amana/Goodman brand?
At the first sign of problems w/MY 15 y/o A/C-she's coming quick.
Piece of advice, handed down from BeenThere-look at the Trane xl15, too