As I'm guessing is the case with a lot of old serials, this can feel repetitive and not particularly great if the parts are watched fairly close together. But there is some creativity involved in getting this all to work together as one big story, and I enjoyed seeing the ways it ended up influencing other adventure/sci-fi movies.
The only other old film serial I've seen is Les Vampires, and I don't think Flash Gordon (1936) is anywhere as good as that. But I think it's worth checking out for sci-fi buffs who haven't yet seen it, and while I probably would've liked it more had it been feature-length rather than as long as it was, the way it's split into 13 chapters does give it a certain novelty factor.
The only other old film serial I've seen is Les Vampires, and I don't think Flash Gordon (1936) is anywhere as good as that. But I think it's worth checking out for sci-fi buffs who haven't yet seen it, and while I probably would've liked it more had it been feature-length rather than as long as it was, the way it's split into 13 chapters does give it a certain novelty factor.