I backed this product on Kickstarter and recently received my fully bound copy.
First off, the product description - and this is true for the Kickstarter as well - does not mention that the adventures are barely connected and in fact have sizable level gaps between them where the GM is expected to add their own stuff. This is not a full campaign, but a collection of vaguely related adventures where only two have real connective tissues.
Further, this is just generally not a great conversion. Encounters are inconsistently designed, and were clearly designed for 5e or 1e first. There are several Trivial encounters where a level 13-ish party is expected to spend table time fighting 3 level 6 creatures. There is an encounter with 8 bee swarms, which are level 4 wasp swarms, which is also at level 13. There is a tremendous amount of Trivial encounters that are clearly adapted straight from the encounter design of those other games. On a mechanical level, I feel like this "adventure path" is not very good, particularly at later levels - the earlier adventures are much better put together.
The story of each part is fairly interesting on its own - I love the setup of "When Comes the Moon" especially, although I feel like some parts fall flat - and this book has consistently *excellent* art, both landscapes and character renditions.
Not quite related to the PDF sold here but still relevant - the actual book itself is quite nice, with nice-feeling paper and good color quality, and a very nice actual cover.
In all, while each individual adventure is Just Fine as an individual adventure, for the most part, it needs a lot of work and he lack of connective tissue is very annoying. (Also, the number of explicitly called out references to other Frog God adventures gets kind of weird, especially ones I have no real way of ever accessing.) I cannot really recommend the full package, but maybe you'll like the individual adventures?
