It's going to be fun to see how they work around all the new items that their not used to.
Mine was not so good. It took me a while to work out how to get refined iron :/
Well before EE1 was released I already started with BC and Industrial-Craft. So BC was nothing new for me, but handling all the machines was. And yeah, some stuff also took me a while to understand. I'm still a redstone-nub, I can't build lots of complicated circuits I just imagine some stuff.
I remember when I played with some friends on a server I build a circuit to automatically shut down my nuclear reactor. I build the reactor inside a small mountain to power the macerators and such for my sorting-system, which was nearby. At this time I had some knowledge about redpower already. At one day I logged in to notice that the mountain was gone and one of my friends told me that he always believed that one of my counters was set a bit wrong
well that mistake turned the mountain into a big crater and destroyed all my sortingsystem (the chests avoided destruction by being a bit too far away). I would have hated it if this would have happened in SSP but sharing it with friends in teamspeak was hilarious and funny, and I just constructed a new reactor on a flying plattform at the same position inside the crater