It's a shame - Chevy offers this free of charge. The Vettes are getting it soon too.Can't you do that with the freeware?
Not JUST launch control...that's just a new feature. It's a plug and play full-functional tuner as well (well, with the ProTuner software anyway), or at least something you can flash your ECU with using the OTS maps. Also diagnostics, data logger, and monitoring capabilities (like a DashHawk).