I have this in an A3 with the 3.2 V6 engine. Better than an Auto and can be
used as a manual with step less changes. The biggest advantage is that there
is no torque converter to wind up when you want to make a fast exit from a
junction. It also has 'launch control'.
There have been reports in a number of the Audi news groups about problems
on the TT and some early A3's but I have had none and have also driven 4
other A3's / TT's with DSG and they work fine.
Before deciding on the DSG I drove an A3 3.2 with the 6 speed manual
transmission, it was almost impossible to obtain a smooth change as the
clutch was like a switch - in or out and not what I expected so the DSG was
the easy choice. This is my first non manual car in 40+ years of driving and
have moved from a Volvo S60 2.4T to the Audi. The ride is no where as
compliant as the Volvo - but its a lot more fun.