while I see the benefits of an all-included box of chemicals for starting off, the main issue I would see is determining developing time for different films. Almost every film datasheet has times for D76. Most have times for HC110, Xtol, Rodinal. They are not going to list ArsImago developers. There is a good chance the chemicals they have packaged can use the times for another developer, but you'd have to determine that if you are going to use. There are a limited number of times on the Massive Dev chart here:
https://www.digitaltruth.com/devchart-mobile.php?Film=&Developer=%Ars-Imago%&mdc=Search Unfortunately MDC times are community based, and not necessarily as reliable as manufacturer data sheets.