We've done 33K kms in ours and no reliability issues. DCT is fine; if you drive in manual mode - let the gearbox deal with downshifts when driving on public roads. The only exception to this I've found is occasionally when driving hard and braking to take a left turn off a main road I will knock down from 4th to 3rd myself. Try not to crawl using the footbrake in traffic, use stop start technique.
I've been lucky enough to drive a Lambo Gallardo and Ferrari 360 - and with both the instructor gave me the same advice regarding letting the computer deal with downshifts.