I'm running a comp in ez mode and dd2's. I had the box in before the injectors and hadn't run the truck without the box on for a while before I put the injectors in, so when I put the dd2's in they didn't impress me much because I turned the box off at first and forgot what stock power felt like. Then I turned it on. WOW! what a difference!
I feel like to get the most out of the injectors, you need a box to go with it. If you are concerned about too much timing Diesel Dynamics is selling a comp and ez without such aggressive timing. Not sure what the other boxes are like.
I'm running the edge comp and no problems yet but when I'm towing that cummins is hammering pretty hard. I'd like to try DD's UFM but probably won't unless something happens to the comp.