Pretty bad, I have heard lots of good things about this show so I watched half of season 1 and I immediately knew it was overrated. Its an action and adventure tv series which tries to be funny and it fails with both, you always know Finn and Jake will succeed and the show doesn’t even try to give the villains a chance. Also it is full of plot holes, you will meet a new character and then he/she is gone in the next episode. So called “Adventure time” has the main characters know everything and everyone at the top of there head. Take a show like Gravity Falls, the main character Dipper actually learns new things and he continues to discover them in the next episode, and in that show not every villain just dies at the end of the episode, it even shows the new character in a previous episode in the next. So in conclusion, Adventure time discovers nothing, connects nothing, is always predictable and never is thrilling or even fun to watch. How do people enjoy this?