The first thing to say is that part one and two could have definitely been combined with a bit more tightening of the story since the first part dragged a little and this part is mostly set pieces that could have been shortened. While the first part had perhaps too much character work and not enough action, this part has the opposite problem, which could have probably been remedied if they had been combined, making a much better overall film.
Having said that, this part is probably more enjoyable for fans, but would make absolutely no sense if you somehow managed to watch it before part one and had no idea about the anime/manga. (I'm not sure who would actually do this, but it could happen!) The action and Titan fights are cool and there is enough crazy fun to keep the viewer engaged throughout, but again, without part one the plot makes only some sense and the stakes are completely lost without context.
Overall this part is the better of the two, but definitely needs the first to make it so. The two together are an adequate telling of the Attack on Titan story, although it definitely could have benefited from being a single movie.
Having said that, this part is probably more enjoyable for fans, but would make absolutely no sense if you somehow managed to watch it before part one and had no idea about the anime/manga. (I'm not sure who would actually do this, but it could happen!) The action and Titan fights are cool and there is enough crazy fun to keep the viewer engaged throughout, but again, without part one the plot makes only some sense and the stakes are completely lost without context.
Overall this part is the better of the two, but definitely needs the first to make it so. The two together are an adequate telling of the Attack on Titan story, although it definitely could have benefited from being a single movie.