As far as I think no book is good for introduction to quantum mechanics..Most of us want to solve mysteries of quantum mechanics but don't want to swallow the bitter pills. Whether one uses Griffiths or Shankar, most of us ends up saying "I need a better book" ...The entire thing is not applicable for brilliant students ;)
As far as this book is concerned umm.. is a good book absolutely...Though quite less content but the advantage is it don't present before you a bunch of equations but g...