I have now run these mounts on the stock springs, MSS track pack springs, and 034 dynamic+ springs on my DCC GTI. These are the only part I've bought from 034 where I feel the build quality is good.
With the stock springs, everything was fine and road noise was increased over rough asphalt.
With the MSS springs I had clunking, thunking, squeaking, rattling, "boinging", and scraping sounds. As it turns out, the MSS springs were too short for the dampener and were loose on the strut under full droop. This is a common issue with the MSS springs with any topmount. the MQB205 spring was the culprit, but moving to the MQB220 spring nets a near stock ride height, and when corner balancing higher than stock in my case.
After talking with 034 about my MSS issues they assured me their springs would work perfectly, so I installed them. They are also loose on the strut, and while they have less noise, the feeling is generally unsettling over bumps, the ride is awful over poorer pavement, and they slap against the topmount/bearing constantly over expansion joists, potholes, small speed humps, etc. Because of the metal on the mount, the sound is extremely pronounced, very harsh, and has even made my wife scream in shock on a couple occasions.
I'm going to be moving to Ohlins and these mounts to see how they play, but if I have issues, or I want to run more camber, I'm probably just going to get the Ohlins or Vorshlag adjustable mounts.
Overall I'd say these mounts work fine, and they do get you to -2.2 camber, however, I would not run them with the MSS or 034 springs without going to a shorter dampener. I've also heard of some issues with these and the Bilstein PSS10 coilovers, but I'm not sure if that extends to other Bilstein struts or what the exact failing component was.