Can't compare others, but did just complete my ZFG tune process. It was super easy with their app and module. Hardest part was finding an empty straight road to data log on, especially with the Thermal exhaust and downpipes not being very "stealth" lol.
Crazy happy with how the tune came out. Did the DMS version so Normal mode has a nice uplift in power and better daily driver shifting, Sport is hardcore max power and very sport oriented shifts (like stock sport mode but on steroids), and tow is tow of course. Happy to report the vehicle is now even more of a beast. Wife confirms "its like I'm on a rollercoaster" as far as the thrills go.