Senior allows you to modify their canned tunes to your liking. However, there is very minimal tuning available by the end user.
What are you wanting to do with the truck. Smarty is ooooooold technology compared to the custom tunes available with EFI live and H&S MCC. As previously stated, I would avoid the smarty and go with the EFI live. You will minimize drive pressure, get more power, more adjustability, and get a cleaner burn of the fuel for much better mileage. And an EFI Live autocal from one of the tuners is $650-$700 with your custom tunes already loaded. Most include 1 year of fine tuning if you decide to upgrade your truck along the way.
For instance, I purchased an EFI live from Dave matthews. When I bought it in December, I had a stock turbo, etc. Last weekend, I finished up my 2nd gen swap with a 366 turbo. I called up dave and he sent me a new tune custom matched to my new setup. And if there is anything I dont like about it, I will datalog for him, send him the file, tell him what I want changed, and will get the tune reworked to my liking. Smarty cannot do that.
Beyond that, EFI live guys with stock trucks are seeing upwards of 500 whp. Smarty cant match that.