The coloring really stood out to me; much like the episode where the Straw Hats got to the top of Zunisha it was very atmospheric and crisp, helped along with some solid Yokoyama art. The director deserves a gold star for using all that serious music for goofy stuff like Zappa's scenes and the Straw Hats being on the verge of a Donner Party in the opening. It added a nice melodramatic touch to elevate the comedy.
Bonam's my favorite of the marine trio, as he seems like a pretty cool guy. Grount's very Devianart/tumblr OC-like and his character arc can be seen coming a mile away, and I too found Zappa rather creepy. At least Sanji's antics generally don't come off as that level of skeevy. Kind of a shame that Brook got benched, but I 'spose he's not as marketable as the MC, the FeMC, the mascot, and the future Straw Hat amirite?
Liked the variety in the marine mooks (hey, there were more than a couple women in there apart from the token one there for Nami to jack a disguise from!), the visual directing, the music, the absurdity of the disguises, the inclusion of the SBS detail that curry's the Navy's main dish - lot to like. Let's hope it lasts.