This is an excellent way to get started with into Age of Sigmar or to expand an existing army. If you're new to AoS, get started using the "Open Play" rules, then hop onto the online Warscroll Builder once you feel like giving matched play a try. Besides the minis, all of the rules you need are included in this set. It includes dice and measuring tools. but you'll probably want to scrounge up some additional d6's and measuring tape.
Looking at price-per-model, this boxed set is an excellent value. The only annoying part is that you will have to purchase additional models separately to bring them up to their minimum size for Matched Play games.
Check out my website to see how I painted the Nighthaunt half of this set: