When I started "Promethea" was so awesome, since she is the embodiment of imagination, and on the first 7 issues, Sophia Bangs, the newly Promethea was knowing about the previous incarnations that they represented the important forms of the new literature genres of the XX Century, like comic books, pulps, etc... also the art was consistent on each issue according to the visited genre. It was awesome and perfect. But after that, Sophia made a travel to understand magic and with that, she met the Taroth, and to find Barbara in the afterlife, she made a travel through Kabalah, and it was truly imaginative, high concepted and beautifully drawn, however I think that part of the early expectation about the book was lost in the journey. I am still enjoying the comic, since it's something quite different and quite insightful. However, we started with the foundations of the new styles of literature on the XX Century and we change to metaphysical stuff, cool that I enjoy that kind of things, but I don't blame the readers that complain about the path that the storyline took, since it's quite different from what you get in the first seven issues, easily a heaven to read for any fan of the comic books, pulps, comic strips, etc...
I am a huge Alan Moore fan, so I am happy to read this series and I recommend it to any other Alan Moore fan, however, I wouldn't surprised if some readers were lost in the way of the progress of the storyline due the drastic change in the core message of the series.