I found it quite limiting as entering positions was inaccurate and it takes no account of differing speakers, room characteristics, speaker toe-in and rake etc. Moving speakers an inch or two etc. can sometimes make the world of difference.
I suggest you take a look at the earlier topic
Creating a Soundstage - speaker placement - a massive improvement for zero cost! - Hi-Fi Corner - Naim Audio - Community
This relies upon how it sounds using your speakers, in your room and importantly being judged by your ears.