What reason did you need to replace yours Poached? And how many miles was it at. Mines out of warranty now 
Failed at 53k.
Was driving along one day when the Mechatronics badly malfunctioned, there was minimal power output through the gearbox and revs were rising very slowly and then I started to hear grinding noises. I switched the engine off and restarted a couple of times but it didn't make a difference so was towed by the AA. In the end both the Gearbox and Flywheel were replaced.
I knew as soon as it happened it wasn't going to be good. Here are some sobering costs:
DSG box - £4200
Mechatronics £1800
DMF - £900
I was given a goodwill contribution which brought the bill down to about £2300.
I've had a similar malfunction in my previous DSG car but the erratic behavior disappeared after a restart and thought nothing more of it but it was a sign of potential mechatronic issues.
I would think this type of failure is rare.
Get the Flywheel inspected first before you splash out.