I purchased the first Michaela video and it was pretty good. When part 2 came out I assumed it would be something different, but as you said the previews show nothing so it was hard to tell. Well, part 2 was basically the same as part 1 without the long intro. They advertise a part 3 but I won't be buying any more unless their previews improve.
They also have a 27 minute clip priced at $57. That seems like a bit of a gouge.
I can't say they're building a lot of trust with me. Decent content but their marketing feels like a money grab.