I'm not gonna keep beating it here, I'm sure you've read through that other thread but check out other sources like the third gen mazda, mazda3revolution, mazda3tuning facebook groups. Even mazda3revolution.com. There are a lot more people with actual experience (on all platforms, 1.5 skyG up to 2.2 skyD), from different countries who can give you feedback on ovtune. As well as people who have turbo'd skys, high revving, custom built 2.5 MZr's, built and tuned ot just built or just tuned by OVtune. Otherwise, your going to get someone whose top mod was a set of weathertech floor mats telling you it's not worth it.