Wow. That was another good episode of Series 6. The God Complex is indeed a very intriguing and engaging story. To me, it seems like one of the first episodes to really test the audience's capacity of understanding, so it's aces in my book.
The only thing with the episode is that, to me, at least, the ending really upstaged it. I have to say that I truly didn't see that coming. I'd heard rumors, but, considering the last few episodes, it makes perfect sense. I do like seeing the Eleventh Doctor's deeper and more emotional choices; Matt Smith seems to be skilled at portraying them... In any case, it seems like everything's set up so that the Series can end as it started (if that makes sense)...
In any case, I'm most definitely excited for next week's episode. The Cybermen will return!!!