Well I was up till 2am last night. Dry roads with no cars logging away.
Here is my honest findings.
With the specific apr tune on my car, past 3000 rpm with the DV+ my car actually lost boost as opposed to my brand new rev D by quite margin. It was only when doing WOT RUNS FROM 4th gear 2000 rpm- later I noticed it wax taking longer than usual and the torque higher up the rev range had flat lined prematurely. I fitted the REV D back on and the difference in high end torque was drastic, however I stand by saying throttle response was slightly improved.
Don't bother buying this kit to go faster, I have just burned £110 lol