Easily one of the best progression packs in existence

The ages system is really well handled, introducing new mods, mobs, ores, and mechanics in a very enjoyable drip-feed of content. It really feels like a similar system to terraria, for the first couple of ages, and in a very good way. Some of the later ages (namely, most things post-plastic) are not quite so fun given the high resource costs and relatively inaccessible automation, as well as the fact that you begin to run out of places to explore and the content well starts to run dry.
There are some less enjoyable parts of the early game, namely most of the biome hunting that has to be done, though you eventually get through it and it's not so bad. Absolutely love the pack otherwise though, feels very cohesive!
Highly recommend playing this on a server with friends.