I have never sat through a series this long before, but the series is such an emotional roller coaster its difficult to keep yourself down to under 3 or 4 episodes at one sitting. I got into the show thinking it looked like a comedy from the ads but it is WAY more than that. Its a peculiar blend of buddy movie comedy, detective series, crouching-tiger style flying swordsman action, some game-of-thrones style family drama where everyone is related to everyone and trying to kill each other over revenge over one slight or another, toss in a couple of Ray Harryhousen style movie monsters with a touch of the walking dead. The sets and scenery are stunningly beautiful (except for a couple where you can see the ground is painted canvas). The casting and acting is top notch, the effects are very credible usually considering that it is such a low budget series. The music is breathtaking (seriously, I still run into the music in my YouTube feed and still tear up a little bit to some of the songs). The comedy is often laugh out loud funny. A couple making me nearly fall off the couch laughing (and I then had to run to google to do some research on the joke's context). The fighting is well done, particularly when you are wrapped up in the story. This is the only show I've ever seen where as soon as I finished the last episode, I seriously considered immediately starting over at episode 1. I only wished I could erase my brain to watch it for the first time all over again. One warning, you might want to keep a box of Kleenex nearby, maybe a bottle of wine or perhaps a therapist because the tragedy in the series is just as sad as the comedy is funny. And when all is said and done, it ends up heartwarming. To me this show is a 10 out of 10.
When I finished it I did go searching the internet and found it also has a book, a comic book, and an anime (which just finished up) called Mo Dao Zu Shi and The Grandmaster of Demonic Cultivation (respectively). Its really that addicting.