I prefer watching the episodes when they air over online if at all possible. I do generally know what happens. I see reactions and images from the new episodes all the time, but it's still fun to see them for myself.
I liked them. Most of the voices for the new characters work and it sets up an interesting premise for the arc. I still don' like the theme song, but it's fun to be seeing new episodes again. I've missed waking up to new Pokemon episodes.
I am kinda worried Serebii's visitor message system will become as bad as this one xD It's both Xenforo so..... A limit to the amount of characters, no gifs, no option to see the whole conversation, etc.