This supplement is fantastic. If you think this might help your games but you are on the fence, trust that it is exactly what you want it to be.
Deep consideration has been made on every upgrade and rune as to how it interacts with 5th edition rules. All the upgrades and effects seem logical and real, and range from minor to major, giving you a lot of flexibility, and the ability to easily insert your own ideas. Every detail you could possibly need has been considered, from an easy to understand pricing structure, to how to apply multiple upgrades, to how long it takes a craftsperson to apply upgrades and runes, to a rune smithing toolkit and everything that entails, to a rune smithing guild that you can add to your world complete with ranks and downtime activities, even a mathematical breakdown for those interested in looking closely at the balance of this system. Something else I really appreciate as a DM is that this system gives the power to the players in what magic items they want. I've rarely seen so complete a supplement, and if you want a robust system for weapons and armor, here it is! It can serve your party from level 1 to 20.