A show with a lot of quality, and lots of risk taking. It's a show with a great dialog and is really something else than "just another high school sitcom". It has a great dialog and some wonderful characters.
Sure there are some episodes there are better than others, but what show doesn't. The show has episodes like no other show; animated episodes, "stop motion" episodes, computer game episodes and so on. There's so much diversity in the show, it's just great!
I will not make any spoiler alerts, just watch and see for yourself! I assure you - you won't be disappointed.
Good luck, and have a great time with these awesome characters.