my trucks tuned with EFI live and I love it and when I get my truck tuned by my local tuner I can understand everything he shows and tells me pretaining to it, and I went from a 16.2 to a 15.3 with just a tune and a flowmaster. Tom the local tuner has tuned Dmaxes with Efi live and has had great outcomes. Great software
2005 rcsb silverado 4.8L, Full bolt ons, obx lt's, ory, comp xr265hr hi lift, Nitrous outlet plate kit, built 4l65e, J-H shift kit, 2500 stall,3.73 G80 , 3 inch spintech cat back, tuned by Rick at Synergy motorsports