Every page in this sourcebook is immediately useful to DMs and Players alike.
The expanded list of alchemical equipment and associated rules are is well designed and easy to understand, and are sure to make the downtime activities for players at the gaming table fun, interesting, and potentially lucrative.
The content in this book could easily find its way into a future Player's Handbook. I hope WotC gives this work a serious look.
[5 of 5 Stars!]