[QUOTE=Until you drive one with a SB, please keep your comments to yourself, because you sound very uninformed. Those of us who have been using these for years stand behind them, check the MB forums, same thing.[/QUOTE]

To the uninformed legitimate information about something they have blind faith in may be problematic, as is the case with you.
Have you looked at their site? have you read about how it works? as they say, in a nutshell, all it does is open the throttle more quickly. It cannot do anything and does nothing at idle, it cannot do anything and does nothing at full throttle, the only thing it does is open the throttle butterfly more, and more quickly, for a given amount of pedal input compared to the EO throttle map.
You may buy into their (Sprintbooster) logic which is The ETC system (Electronic Throttle Control) – also known as drive-by-wire –has the unfortunate downside of delayed throttle response and subdued acceleration, creating problems in certain circumstances such as up-hill starts, quick gear changes, overtaking, etc.. For some cars that indeed may be an issue, much more possibly on small turbo power-trains that are in search of MPG as opposed to performance. For the Crossfire that I own and drive their contention simply doesn't apply. I find great correlation between the pedal input and power delivered. Why would I spend $300 to fix a perception, not a reality?