Well, I'm actually surprised with this show. It's definitely not as good as 2 films.
Animation is worse than in the movies, but not that bad. My only remark is that they sometimes use the same model for different characters, only changing the color of the robes. But even Disney is doing that. TV series cant spend as much money as for the movies. For example Aladdin TV series. Every male child looked like a miniature Aladdin, with same hairstyle.
Voice acting is GREAT. Voice actors are so convincing (except Tigress), they sound like their movie counterpart, especially Mick Wingert as Jack Black. And John DiMaggio and Richardson are great as Fung and Temutai.
Story is OK, with one or two plot holes.
New characters are good. Maybe little clichéd, but they're not annoying (for example "Aladdin" had Abyss Mall the worst cartoon character in history!!!). Some of the villains are even great, like Junjie and Temutai.
Overall, the show is decent. Nothing special, but if you liked Kung Fu Panda, you're like this too.