Hi Dr Morales,
I've been utilising X3 since October 2020 consistently.
The benefit of a set up that is portable being it can go where you go and no need to find a gym.
Like Bitcoin I would say "there is no second best" if you are optimising body composition, reducing fat mass and increasing muscle mass on top of an optimised diet.
The system will meet you where you are at so to say and it will reveal your weaknesses from which to grow stronger.
In that sense suitable for all clients young/old, male/female etc...
It's a tool to strengthen the body then for sports you practise the sport specific skills required.
Unspoken in the weightlifting world I would say is joint injury and again X3 is an excellent solution as it is effectively acting in the opposite direction. Lightest when you are weakest and Heaviest when you are strongest.
Recommend reading over the website;
https://www.jaquishbiomedical.com/
I would not return to a gym for weight lifting.  The results are inferior in comparison.
X3 allows you to apply more force safely to the body with minimal risk....