The episodes are a bit repetitive, but still very creative and unpredictable. We know the Lady will win in the end, but it's always a surprise how. The two leads are very well balanced and likable, and the series manages to create enough interest. Marinette herself is a very great role model, but still feels well rounded enough to be sincere, and the audience finds it easy to root for her and Adrien, the secondary lead; and there is enough tension between the two to keep it compelling.
But I really hope the series develops on the premise and on the conflict for the plot, rather than use it to keep propelling a status quo. Even with the series' great premise, anything gets repetitive if done for too long.
Hopefully this great series can become a REALLY great series, and with its large fanbase it'd certainly be so gratifying. Here's to season two!