If you aren't watching this show, there's something wrong with you.
It's the most creative, innovative, colorful and surreal show on TV right now. The stories always take you places you don't necessarily expect but are familiar also. While it is based firmly in formula is resists being formulaic.
The character interaction is stylized, the kind you see in some of the more lucid moments in a David Lynch movie or in old noir flicks. What's cool though is that there's a truth in this fakery. You know that people don't really talk this way or react this way, but knowing this gives the character interplay an honesty that most TV shows don't have.
Of course, the cinematagrophy and sets are gorgeous -- seemingly inspired by the same places and things Salvador Dali and Dr. Seuss were.
Of course, the show isn't without its problems. Sometimes there are issues with flow. Getting from one area to another sometimes is forced or awkward. But these are small prices to pay for such a great show.