Cosmos Auto in W Babylon got good reviews on line so I called for a price on an ECV valve on the ac for my 2009 Sonata. I had a comprehensive ac evaluation at PepBoys in Lindenhurst a couple of days earlier, was told the Freon was full and they found no leaks but the "compressor did not engage". The ECV issue is common with that model and year. I decided to shop around as I have been looking for a competent and honest repair shop since my go to guy of 15 years sold his shop. Understandably Cosmos Auto wanted to confirm the issue before providing a price and told me to bring my car in for a free ac evaluation. Nice clean place and people pleasant. I waited in their comfortable waiting room for them to evaluate the ac. After a while a guy came out and told me I did not need an ECV valve or a compressor and they found no leaks but the "Freon was absolutely empty" contrary to what I was told at PepBoys. The cost with tax was approximately $250. They added, though they didn't think so, if there was a "minor undetectable" leak, a dye in the Freon would reveal this in a few months. I was excited to finally find a competent honest replacement auto shop. I told family, friends and work associates and had plans to bring my son in law' s car in for engine work and my nephew's car too. I drove my car to work the next morning about 12 miles, ac worked beautifully and it worked driving home too. The next morning I turned the ac on and it blew hot air even hotter than it did before the Freon fill up. I called Cosmos Auto and a woman told me that the dye in the Freon is to determine undetectable leaks in the ac. Since the ac lasted no more than 24 hours if it was leaking, it was not a minor leak requiring dye to detect it. This appears to be a tactic to force customers to come back to an auto shop for expensive ac repairs. Needless to say, my search for a competent, honest repair shop continues. read more