Having bought both it and Hermetic, I find that the unwieldy size of GDTT makes it marvelous as a study deck. But for a portable deck that I can pop in a bag and pull out when I'm not at home, the Hermetic is definitely better. I've changed my opinion of Hermetic and find it just as helpful with its own brilliant art.
Waite decks are definitely slipping away from me now as I prefer these decks and Thoth whose every inch of the face is crammed with details and symbols, accompanied by texts that describe every last one down to the smallest shape and colour. The more I use them, the more the Waite cards fade into blandness and diluted simplification.