My main complaint was APR DSG tune was very aggressive with downshifting when I was coming to a stop, even in D mode. It made it hard to just cruise around smoothly. The shift points were better though, for sure, and I liked that launch control allowed traction control to be on.What didnt you like about the APR dsg tune? there are a number of options you can configure about it. I have always hated my stock DSG tune both on my Golf R and my GTI - the sport mode on most DSG tunes is very aggressive, but D is set just perfect.
JB4 is great, I would say if you don't plan to go past stage 1 then its worth it.