I thought this was an incredible episode. Extremely disturbing for sure. I really felt bad for that couple. You build your dream home, and then in the friggin NURSERY you find a body in the wall. How much you wanna bet that they move out of that place as quickly as they can?
Also, I loved the team interraction, In particular Emily figuring out that they would have killed before, and probably one of the places they vandalized. I also loved Hotch's interraction with the detective. BTW, was that Micheal Ironside? It sure looked like him.
I also loved Garcia and Morgan's interractions. The sweet "I love you's" and meaning it like a a friend/sibling. That was sweet, Especially because the minute I saw him sit down with the victim's sister, I knew that it was a bad idea, and that he was getting too personally involved.
Probably one of the most disturbing episodes I've ever seen of the show. I swear, those guys WERE animals, and you could tell they were trouble from the minute they were on screen.
ETA:
Am I the only one who HATES JJ's new Hair and makeup? She so totally does not look like JJ now. She looks rather...cheap...IMO. She looked so sweet and cute previously.