I've just sold mine... :bawling:
Only problem I had was the Hydraulic unit on gearbox that needed to be changed at 88,000km. Was done under motorplan but cost them R23k.
From what I have seen, most units only last about 80,000km so check the motorplan on the car you interested in if the unit has been changed or not... Also check for altenator, also only lasts about 80,000km.
Other than that my SMG was a dream! Miss it already!!!!
Remember that the SMG is a manual gearbox, the clutch is controlled by a computer! So its exactly the same GB as the manual version!