I did not have the same experience as the previous review. Not at all... They also have good reviews on Yelp, where I also left one.
Our Ford F250 diesel broke down on 234 and all of the oil poured out of the entire truck. We stopped by a couple of shops and no one wanted to work on our apparently incredibly complicated 6.0 diesel engine. We even took the truck to another shop when there was only minimal oil leak and the estimate was outrageous.
Long story short we took the truck to Haas and they diagnosed the problem immediately. They gave us an estimate and while it went up a couple hundred dollars after the work was completed we are incredibly happy. They worked on the truck immediately, were reasonably priced and did everything they said and when they said it. They also didn't blow off our more difficult diesel truck.
They need to put diesel repair into their listing.