Really disappointed, Very expensive, not professio...

Really disappointed, Very expensive, not professional , NOT RECOMMENDED.
My Prius A/C fault was diagnosed at this service center that it needs TX valve replacement, they gave me a $480 quote to replace it with NO GUARANTEE that their job will fix the problem. I paid $178 for the diagnosis only plus > 5 hours waiting !!
My friend recommended a professional technician who delivers his service at home, diagnosis was FREE and 10 minutes he checked the TX valve and it works 100% normal. The problem was with the compressor, I bought an used one from ebay and he replaced it with total cost less that of CMI for TX valve replacement !!!!