I really did want to love this episode based on the show's accomplishment but it was really hard too. It's sad to see that the only 'big' thing that can happen on Big Bang is the possibility of Leonard & Penny getting back together. It just was a hit and miss for me, especially since the show began to deteriorate once these two got together.
So basically the entire episode was in Leonard's head? Not only was this a bigger disappointment but it seemed like the writers just scrapped this together to produce shock value but really nothing happened, which is probably for the better int he long run, but its still not worth it, especially if the same thing could end up happening in the episodes that follow.
Sheldon has been... off and the rest of the characters aren't really as interesting as they used to be unfortunately. Big Bang still has its moments, unfortunately, this wasn't one of them.