This mod really has something for everybody, except maybe the really avid arachnophobia. The vanilla game was difficult enough to begin with, but now it's even more difficult because of the new biomes, the new trees, and the strange, hostile animals that roam freely. This mod is still in early stages, so things are still being worked on. It also adds over fifty new mob types, twenty of which can be placed anywhere in the map. The mod also adds over a dozen new blocks, all of which are generated naturally and can be broken to obtain useful materials.
If you love mods but are tired of the same old stuff, then this is one of the best ones out there. The twilight forest mod for Minecraft is like a dream world come true. It allows you to feel like you're a part of an exciting world that is unlike any other game out there. So if you're tired of having to fight and kill every single mob, this mod is definitely for you.