Well no booklet Kaymont describe the various functions of the system, such as stock, performance or towing. I shouldn't have to download and reprogram to switch from stock, performance and towing. Previous versions all you had to do, it was touch buttons to switch from stock, to performance to towing. So far unhappy
After a month of solid research i decided to go with Bully Dog. Very easy install, excellent graphics, produces the best information from your vehicle. The Tow tune turned my sluggish truck into a sports car like feel to the drivetrain, great shifting, and perfect use of the 5.3 power band. If you have the chevy trucks made between 2000 and 2007 (classic) you should have this tuner.