Simply put, it felt similar to the rest of the episodes lately. It was watchable and enjoyable, but not superb. It had a few great moments of emotion mixed with a few good moments of humor.
However, the ending is where the episode really leaves its mark in the Depserate Housewives history!
SPOILER:
With Bree's alcoholism back in play, she falls apart as the murder investigation proves to just be chucks way of getting back at her, not because he cares too much about the crime.
Bree then does the unthinkable. The scene with her sitting at the table with the gun was magnificently portrayed as Mary Alice smiles back at her. Bree covers the extent to the life she lost as Mary Alice points out the sad truth in that "Things change."
While the scene was powerful, it could have used a more emotional musical overture, much like they used back in the day. Take the music playing when Bree received the phone call of Rex's death? It was legendary.
Over all, the ending is really the main winning point of the episode, and truthfully shows the mental state of Bree, turning this really into her story now. Personally, this scene alone was more powerful than any of the "disaster" episodes that they end the mid-season with, save for maybe the episode Bang. Something about Mary Alice has always worked for me, and including her outside the voice overtures is always great. Good job!