Ordered one for my friends 06 Dodge Cummins, should be here next week or so. All we care about is fuel mileage improvement since these trucks already have enough power in stock form for us.
I have been to many websites such as this one and can find nothing negative about the workhorse except the usual, "it's a rebadged Dr. Performance".
I have talked to several vendors and they don't deny it's a module made by the same company that supplies Dr. Performance his modules. The difference is the workhorse module uses a different program with a different code.
I'am looking for end users experience with the workhorse module.