I did run this with my group as an intro to Chult. I definitely think the mini-missions overall were a really good way to introduce them to Chult. Of course I would say that certain aspects of the missions were definitely rough around the edges, or otherwise could have been polished/executed better, but over all, I think it does a phenomenal job of introducing players to Chult, allowing them to get a better idea of the kind of adventure they're in for, and conveying the general attitude and feel for Port Nyanzaru that the DM can then use to springboard into Chapter 1 of Tomb of Annihilation.