I would put the smarty in about the same ball park as the H&S tuners , I am fully deleted so I wouldn't have the same headaches you guys would . I have to say I absolutely love the 6.7 especialy towing , what an animal

Ok I will step of the soap box...............

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2007.5 White 3500 6.7CTD 200,00KM 68RSE Auto 3.73, EGR + Cooler /DPF Deletes , Smarty S67ME level #8 , Amsoil 15W40 , Amsoil BMK21 bypass filter , Rinoliner , Isspro guages - pillar mount 3 - console mount 2 , Progate Exhaust wastegate , Flowpro dual exhaust , Flowpro Twister muffler , Mag-Hytec Diff covers F & R , Amsoil 75-110 Diff Oil , Firestone airbags , AirRaid filter box with Amsoil conical filter + sock , Roda Deaco PAS , MHP Stage ll tranny tune