i like this episode, simply because it reminds me of the good old days where the brothers hunts monsters and ghost with attitude - no angel and no demon. I've been waiting for this kind of episode to come back to the line. (It's really been a while since 'tall tales' or 'hell house')
I'm not saying that angel and demon saga is bad - I am a huge fan of supernatural. What I mean is that, this kind of episode is what's make the fans fall in love to supernatural at the first place - hunting! So after a while, I'd really love to see some old actions in between the apocalypse. And I'm glad it did.
This is one hilarious episode - the "house of wax" injoke is awesome. waiting for more, hopefully on the next episode!