I'm always interested to read these threads.
The people who have bought the product present the pro's and perceived benefits, the people with something else / nothing come back with the knocks and 'you shoulda bought summat else'!!
Being one of the K04 camp running this it has made an enormous difference and removed a very noticeable flat spot in the rev range. I think it has really unlocked the potential of Revo Stage 2+ and KMD pump internals. I think for the price it offers a very well conceived design and mix of materials which major on engineering and not FUSS. As I'm an objective modifier I want it to work, period. It's what it delivers on the road, not with bonnet opened parked up that matters to me.
And on the note of pump internals, before anyone starts banging on about KMD/Autotech/APR, the APR has had faults as have the others. Don't feel you have to take the 'premium' route as you will gain nothing more. It proves yet again, that the highest price products DON'T necessarily deliver the best solution (Milltek have proved that in very recent times that their pipework is regularly reported to crack - thank the lord they have a good replacement scheme).
I think having read this post I am going to have a fiddle with the SPS settings, and back the boost off a bit. May get me a bit more sustainable performance. That said, the car may not be with me that much longer as I have gone and put my name down for a used Cayman S at the local Porsche centre this weekend (yes, a poor mans 911), but the heady mix of S3, Revo Stage 2+ / ITG / K04 and KMD fuel pump has been an absolute blast.