I think this show is a wonderful and entertaining show. I'm 13 and I watch it almost everyday on nicktoons. One of the best parts is that they take old fables (such as the boogey man) and come up with an explanation.
But as I was reading though the other comments I saw some things that I had to say something about.
Ginger87: yes it did take place of Doug. But I think that nick thought it was getting old and people found it not interesting anymore.
email@example.com: They do change there cloths, (well at least Martin and Dianna) they all just have the same colors/patterns.
Well I hope my comment was helpful. And I hope you all enjoy watching I know I will!