okay FINALLY got around to watching this
I would definitely say that this has been the best series debut so far, even the three-parter DP one didn't have quite as much packed into it as this one did. The episodes did a great job of introducing the characters (even though I'm annoyed that Serena's appearances were mainly just cameos), showcasing Kalos/Lumiose City, and building up future plot threads, but it never felt too dense or fast paced enough to make it unsuccessful.
The new characters all all looking great so far! Clemont and Bonnie haven't shown too much of their personality so far but what has been seen works at least - the brother/sister relationship between them was surprisingly adorable! And Serena wowow.... i LOVE SERENA sorry i'm pretty biased.... But from what we did see of Serena she seems funny and energetic and I'll be interested to see how she fits into the group dynamic with the other three.