Well.....
I would sau yes, now that I have tested it...
the car is more "drivable"
Fuel economy is notisable since in everyday driving you dont have to press the pedal as much as before
Also this low end impruvment helps "clear" the low rpm quicker ang go to the mid and high rpm were the HP is..
In the Greek Kia Club there is a second car with custom header free flow cat that will try a different program, an englich one...

The cost is 400 euro -20% discount for the club and installation an other 50 euros - 20%

the one thing is that they are reliable, meaning that about 1.000KM now nothing bad happened..
and it also works fine "out of the box"

Megasquirt that i had in mind for a long time needs significant "fiddling" just to get the car running..
could it give something more???? I doubt it if you are not willing to go turbo NOS injectors, cams e.t.c.
if you are, yes deffinetly Megasquirt is a better solution in the longrun...