Nobody expected these "B" serials to be serious cinema (except for kids of the day), but they are so bad that they are fun to watch. The starchy costumes freshly washed and pressed from the wardrobe department (with some exception), the hokey dialog, the horrible acting, etc are almost unbearable.
But, at my age, I like to look back on those days when I went to the Saturday late morning kiddie show for a dime and participated in the screaming and yelling while watching eight or nine cartoons. Then came the serial or serials which quieted us down somewhat because there was more dialog, no matter how inane. Hell would really break loose if a projector broke down.
It's amusing now to watch actors trying to get a start before reaching higher status, such as Ruth Roman flitting around in a third-rate Tarzan movie set in flowing gown, beautiful coiffeur and hollywood makeup without getting a speck of dirt on her or her gown, or her cosmetics and hair being mussed up.
If you don't expect much and if you are old enough to tolerate these cheapie movies, you will appreciate the very good transfer to Blu-ray and the optional subtitles.