Any comments, good or bad, about DSG gearboxes?
Like most things, if you're a fan then they go on for ever, never need servicing and will handle a bajillion horsepowers without breaking a sweat. If you aren't a fan, then they are made of chocolate and cost £10bn to fix when they go wrong, which will be every 800yards.
Personal experience, SWMBO has a dsg in the yeti and i find it very nice. On the move you cannot spot the changes unless you are really going for it. In stop start traffic it was not as smooth as my M140i's "traditional" auto (when it worked) but was still smoother than the auto in my Mig. Also, without a torque converter you will get less transmission loss of power. Which may be significant if looking at a moderately powered estate car.
From memory, I believe that the 6 and 7 speed dsg units are actually completely different in how they work (1 is dry clutch, the other wet) and 1 is more problematic than the other. However, as with all things in cars and the internet, people only come online to moan so the problems are likely overblown.
Clutch packs aren't covered on extended warranty because they are a wearing part. Just like the clutch in a manual car.