I have recently had a bad experience and then a good experience trying to get my fairly new 2010 GMC Acadia Denali serviced. Something wasnt right when I was driving it, I know the basics of car mechanics, and it felt like the transmission was shifting at the wrong time, I was pretty concerned it would need to be replaced. I ended up at Lehman GMC in Miami to see if they could diagnose it. I was told I would have the car back within two days. I never heard back so I had to call THEM! Short story, they kept giving me the runaround, and finally quoted a high price. I decided I better get a second opinion. After asking around I ended up at Williamson GMC, also in Miami. Wow - what a difference, the workers all had smiles on their faces. They called me back that day, and explained everything up front that needed to be done, and gave me a lower price than I got at Lehman. My Denali was back to me Sooner than they had estimated, and it has driven seamlessly ever since. I guarantee Williamson has got my business from here on out.