Status for the update to 1.11.2: Time spent: ~180 hours. Updated: ~30%. Stop nagging us, or we might notice we know ways to spend our time doing things that are more enjoyable. You can follow our progress at here and here.
Ender IO is a full-sized tech-mod. I could compile a complete list of features and hit you with a 2 mile long wall of text, or you could jump to YouTube and watch one of the "About 274,000" videos there. Just be aware that things change over time and Minecraft versions.
EnderIO requires a reasonably current Forge version and EnderCore.