I thought it was a bit slow in some episodes. If it weren't a sequel, I probably would've dropped it a long time ago.
But hey, I could say something similar about the first series, too. So it could just be my tastes.
However, it has picked up in recent episodes. Well, I'd recommend you try it. Eureka is the the most adorable thing ever.
Oh, an Ao is a really likeable main character.