Personally, I like EE, although I do not use condensers or collectors. I use it so I don't have to have a billion chests full of stuff, and it's nice to be able to turn my diamonds into iron or other blocks I may need for a build. I also like that I don't have to destroy a desert biome to get glass. The only thing I currently use red matter for is the RM furnace, although I would be fine using a dark matter furnace. Because we don't use condensers or collectors, it does take quite a bit of time mining to be able to afford expensive machinery and tools. I think the red matter tools are too efficient, they dig way too fast. I have a red matter pick that I literally only use if I need to move my rm furnace. Trying to build with it is nearly impossible, especially if I'm building something with marble and need to make a window (one click and 95 blocks come down). I honestly don't feel like EE is OP without using condensers and collectors as I still have to collect materials and mine to earn EMC for other blocks. As for Quarries, I never have and never will use them. Huge holes in the ground are definitely an eye sore.