I have been playing this Modpack in single player for some time now, using the mods Project Red, Ender IO, Extra Utilities, Minefactory Reloaded and BuildCraft. So far so good, I have not experienced any problems, lag or bugs. I will eventually move on to other mods, but I have to read up on them first. I just wanted to say this modpack "feels good". I still have to work for what I want in normal mode, but that is part of the fun, as long as the author does not become obsessed with details and lose sight of the fun factor( like Gregtech/GT addon yuck), I am good to go. Just wanted to say thanks again for a great modpack. I am not ready to join somebody's server yet but maybe later on.