Ofcourse it's not "better than any other deck".
The most effective deck for the spell caster - is what the spell caster most likes to use
(says a spell caster).
The variety of tools exist - happily - for each individual to find their own best "fit" - particularly in the arena of magick imo.
For me - because I am Wiccan and this deck is so obviously "made by a Wiccan" - I loved it on sight.
I've no doubt it will become a "go to" deck for my spell casting. (I have several spell casting decks. They "fit" differently for different things/moods).
Presently - I'm still working my way through getting familiar with it - which will take me quite some time...