Ignoring the slagging match above..
Here's another happy customer of the RSTuner kit I have since yesterday.
As said before, you can do various things i.e. save/writing ECU maps, view live data in graphic form and as a list (which also registers the minimum and maximum values of the run), log data (which you can read later), actuator testing.
All that for €155

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But even if you only could upload the generic Group N map, then it's still far cheaper then the alternatives.
The option of writing your ECU is limited to 1 car though, so no use in buying 1 kit and trying to update the ECU of all your mates

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Thinking about putting a carPC and a touchscreen in the car, makes it easier then dragging your notebook.