It is the funniest cartoon I'm watching right now. Thankfully it knows that how to time its jokes.
My only complain about the show is Leo. In every other incarnation of the Ninja Turtles he has always been my favorite character, but this time I find it to be sort of a tool...
All the other turtles are exaggerations of their 2003 counterparts. Mikey is more comedic, Raph is more volatile, and Donni is more geeky. But in Leo's case, instead of making him more serious, they went in the completely opposite direction.
I get what they're trying to do with Leo and I wouldn't be surprise if he ends being the most popular character for younger audiences (after Mikey), but still I hope they give him something in this series soon that actually fits the role of the "leader".