Yup, I'm a fan of this too. I'll admit it's not without flaw, the biggest of which is that it sometimes goes painfully slowly—like waiting for a TV show, only with much less content to wait for than a typical TV episode. It's definitely worth watching, though—I describe it as having combined the positive traits of Friendship is Magic (Focus on emotions and companionship) and Soul Eater (Focus on teamwork, the "fighting academy" premise), and it does so quite well.
I really like Penny (And I was among the first to guess she was a Robot), but she feels like she's...well, over the top. I often refer to her as overpowered, and her weapon is kind of the best weapon we've seen so far. I don't want to discredit Penny, I think she's awesome—but she's going to have to be handled carefully to not make the other characters lackluster by comparison.