I use a mini DSP unit. I think you have to use your ears to judge the validity of the results and experiment with the different curves. I spent maybe 2 hours doing this and haven’t looked back since the day I installed it. My listening room is relatively small and if I move out of the sweet spot the settings sound less valid, but I if I am out of the sweet spot it’s because I am occupied in a task that distracts me from listening so I don’t care much.
There is no absolute truth here. You are digitally manipulating the signal in an attempt to correct for quirks in the listening room. If it sounds right, stop, relax, enjoy