I had APR 95+98 on my Anni, and it immediatly caused problems.
Lifting off the throttle gently would cause the car to judder/shake.
Supplying dealer (fontain Audi) took a look at it, and blamed the engine mounts, but yet did not agree to putting the car up on ramps for an inspection - to atleast show me..
APR sent me a new VW DV, but that made no difference.
In the end I got absolutely no where with either of them. They took my money, and that was that.
Not long after, they guys I was dealing with at APR left and set up rival company REVO..
I was left with a very bitter taste from that, so that is why I waited and researched heavily before deciding to go AMD to chip my R32