I have the APR one, got it for free

from Awesome when the APR gang were developing the stage 3 conversion there. Also got it fitted for free at JBS when they fitted the ARB's

I must admit that I haven't felt any vibration either, like Toph says it is due to the inherent smoothness of the DSG.
There have been a few warnings over on VWVortex about people who have had them fitted to tuned engines, but not used a strengthened bolt. Damaging both the bolt and the thread.
