Finally aired in the United States. (Must I say this every day this week?) This episode was great, since it was all about Lana, her Popplio, and the students fishing with Lana. Some hilarious moments include Ash meeting Lana's younger twin sisters and them annoying Pikachu, Lana "teasing" Ash about catching Kyogre, and Mallow and Ash yelling at Rotom (and breaking the fourth wall) for the timing of pulling the lure. I like Lana a lot, but this episode makes me like her even more. That goes double to Popplio, too, as I liked its personality.
The backstory on Lana how she got Popplio was great, too! (What are you trying to do with poor Popplio, Team Skull? Glad Lana have Lapras ice beam the grunts and rescue Popplio. Also shows just how much Lana really likes her Popplio.) What I didn't like was Team Rocket insulting the Ride Pokémon and Lana, but that was expected of them. Don't mess with Lana or insult her, you really don't want her "icy glares!"
All that being said, this makes me look forward to episode SM016, in true English dub, of course.
EDIT: Also want to add that this episode is my favorite so far in the Sun & Moon series.