Very please with Bob and the tech who work'd on my vehicle. I came to diesel specialist, because about 3 years ago I call'd and talk to Daryl for about an hour. He answer'd many questions I had about performance changes I planned on doing to my F350 . He went on for ever, like he was just excited just to talk about it, and not trying to sell me a thing, just advised. I went with another shop, but was not given all info . I thought I needed. I ends up needing additional equipment for chip I had installed. Unable to install equipment at this time, they advised me how to achieve maximum performance out of what I had. Will not go any where else for service other than diesel specialist in the future. Thx guy's