kgati is right - a SMG is not an automatic. It is a manual transmission with a computer contolled, hydraulically actuated clutch system. While you don't need to know how to drive a manual to drive a SMG, I found that it helps. For example, let off the gas a little when you shift to let the shift complete and the clutch engage. Don't shift when the RPM are too low. I much prefer to drive in manual mode than in automatic mode. Also, driving in Sport mode or other enhanced modes will be very different. Go out and practice. Keep in mind that the car "learns" your shifting style, and will adapt. So, it helps to drive consistently. It took me about two weeks to learn how to drive it smoothly. Now, I love it.
2004 325Ci SMG ZSP ZPP Orient Blue
2009 328i Tasman Green