I absolutely love the Deviant Moon. There's nothing quite like it. I don't find it sick. Quite the opposite; I find it healing. A very truthful deck, the images pack a punch in a way that reads crystal clear and in a way that really stays with you (they don't leave your mind; they keep working with you, transforming you). I also love the aesthetic of the sepia toned night, the playful pops of color here and there, the moon people that seem to glow, the different moon phases in the background. It's a deck that feels almost carnivalesque in its vibe, and yet its inhabitants are all very approachable and the overall feel of it is very down to earth once you get to know it. It also has the perfect ratio of creepy cuteness, making it both cozy and yet very badass. Somehow it never grows old. It is a very enchanting, inspiring deck and it feels very alive. Very balanced too, perfect for any mood (serious and deep when it needs to be; or fun, whimsical, more casual, etc).
I don't own the book, but I will probably get it someday. I can echo the same reccomendations for the borderless edition. The images are crisp and large, and the quality is wonderful (the edges don't chip like crazy as with some other decks). The artwork is beautiful behind the screen, but there's truly so much to appreciate when you see it in person... each little teeny sparkle of starlight peppering the skies, every stone brick and furrowed brow.. There is so much to explore.
But it really is becoming one of my go-to decks this year. Again, it just has this oomph to it that I don't feel as much with some other decks. Very clear voice.