The CG is probably the thing that could turn people off, but once you get past that you'll find some enjoyment in this show.
The characters are rather one-dimensional, but they're entertaining enough with their quirks. My personal favorite is Grumpy as he has the most depth to him, and also I really like grumpy and sarcastic type of characters.
The writing is okay, and there are some jokes that will give you some giggles know and then.
Voice acting is good, and actually feels like the actors/actresses are putting in some effort.
Music, not much to say about it, only that it works for the show as all.
So overall, this series is a great watch for kids, as well as adults. If you have kids, then you should most certainly cheek out this series.