This book is of limited use to many DMs- the subclasses aren't designed for play above level 6 and the monsters are also limited to low level.

The setting of course is very well written and the concept of a low power setting is interesting; however, if you're like me, it has the issue that although the content works with DnD 5e, it isn't fully compatible. You can't drop the subclasses into a non-Brancalonia setting and all the enemies aren't very interesting past low levels. It's not a book you can use as a toolbox- it's a narrow scope product, which is not useful if you don't intend to use it in that way. Realistically even non-Brancalonia subclasses are going to be a weird fit within the game, as the Brancalonia specific subclasses don't follow classic progression and could easily overshadow or underwhelm compared to other 5e player options.

My initial intention was to drop the entire book in as a part of a larger world- with the current situation it's basically a low level starter zone.

I will mention that this review has been coloured by backing the Kickstarter, then learning what I'd actually backed after the campaign closed and not being informed. I'm aware that colours my review, but I still think giving this one a miss unless you are specifically interested in a low power campaign- and at that point, you may as well go and play Warhammer Fantasy Roleplay. I'm just aware that most of my 5e players don't enjoy 5e at low level for long, which is awkward, given that's what this book provides.