I'm someone that went from a manual GTD to a DSG R in January there.
Having had driven manuals for the last 30 years I thought I'd give this auto thing a go.
Now its not just a case of stick it in D and go. You really need to watch the road conditions and know exactly what gear your DSG is in. Its caught me out several times when I was needing some acceleration and the car just sits there going down the gears from 6th to 3rd for what seems like an eternity. It really is annoying.
Watching the road conditions and having it in the proper gear then its absolutely great but its definitely not a put it in D and forget about it gearbox like some claim it is. It is extremely interactive.
I tried running about for a few weeks in its manual mode and it returned about 17mpg whereas the same kind of conditions in D would return in the low 30's. I'm past the point of watching the MPG and just drive it like I want but it is worth baring in mind.
Sometime I think to myself I'm going back the manual route on my next car then I drive my wife's manual GTI and am glad I have the DSG