Bro he charges 500 bucks for a tune. I was there this past weekend with a friend who just had his 07 SS dynoed. He does great work and you will be very happy with results.
Remember its just a tune and your not adding a cam,headers, whatever else but im glad i went there.
Once you decide to go there he will do what he feels is best to do on ss and also you will be there for 2hrs or so bring a book or something to do, lol.
What i like about his dyno shop is when hes dynoing your SS theres monitors around his shop showing you numbers and your not left wondering being hes fiddling with HP Tuners in drivers seat, lol.