Speaking from the position of someone who played it sitting on the floor of my room, when there were other, better RPG's at the time, I'm thinking it actually compares quite well to mobile RPGs now, which by-and-large are absolute trash.
What I want to know is: what you think of it as a mobile game? Can you pick it up anytime, enough to make the grinding worth it? But not too demanding to make grinding the only way to advance?
I've been playing The Knights of Pen And Paper, which is a very Skinner-box throwback to the old grindy jrpgs in a DnD skin, and still I can't decide if I like it, even after spending many, many hours playing it.