There is also Custom Code and Viezu that do tuning... and probably others I am forgetting right now
In very round numbers all the various companies will give you around the same torque and kW increases, they are after all playing with the same equipment and essentially tweaking the settings (which is a waaay over simplified way putting it).
In any case, if all you are ever going to want is a stage 1 tune, then I usually tell people to pick the tuner who provides the best service closest to your house/work then go with whatever brand they sell.
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