I downloaded the mod pack to see what all the fuss was about. I went in with an open mind and played for roughly 10 hours (in total). My general impression was that someone just located each and every mod out there, smacked them together in a pack. Nothing has been done to tweak or integrate the mods, they are just working, and that's it. I do see how this pack has a certain allure to some players out there, since (and I quote this from the modpack) "it's not cheating... but it's close!".
This fact and playstyle is lost on me. I don't want everything for nothing, I want the game to be an actual challenge. That way, whenever I create something in game, I will have at least a small sense of pride from the work. Looking at this modpack and what people create in it, I just go "meh..". They might as well have creative mode for all I care. That said, I will again say, I'm baffled as to why players would even want to play this. This modpack has got to be a nightmare for servers.