This modpack is a love/hate experience.

Sucks. It just sucks. Not because it is bad, nor is it poorly optimized or anything like that: it is its artificial difficulty implemented. How is it possible that as soon as I start I have a skeleton that is 20 levels ahead and I still haven't even been able to get iron? And to my surprise, in a desperate attempt to get minerals underground, in a space 3 blocks high, a 500k health dragon appears out of absolute nowhere. I think that the balance needs a lot to polish.
Overall it looks good, moves well. The classes and powers are great (although a little messy to configure to your liking).
Anyway. It could be more fun and enjoyable. Maybe it is aimed at a hardcore audience but it is an insufferable modpack. Dawncraft 2.