Considering multiple aspects, this is a wonderful show. Every character has a very specific personality, and most all of them actually develop as the show goes on. The humor can be dry, but is incredible if you actually get it. If you were expecting Beavis and Butthead, sorry, you will be disappointed. I've noticed that most of the negative comments talk about how Beavis and Butthead was so much better. I think it can be best said that you have to be able to appreciate intelligent humor to laugh at this. If you think, say, that Jackass is the greatest show ever, then you will most likely hate this.
However, if you like a humorous show that's incredibly well developed for a cartoon (the character development, themes, etc.), then you will enjoy this.
