I think this ad makes for a good comparison to the Melacon ad. [youtube=http://www.youtube.com/watch?v=cUSF_zEtW8w&feature=player_embedded]
Where that other ad was vanilla and left me cold, this ad is much warmer. Part of that is personality I bet, Blumenthal might just come off better on camera, but also look at the background, the way they're dressed. I believe Blumenthal, even when he's spouting message.
I also like the end tag: "For You. First. Last. Always."
I think too often political ads are so focused on the issues, they're not focused on the emotion. I couldn't tell you what Blumenthal was talking about, but I do know I liked him better after watching the ad then before. Issues are usually a MacGuffin, they give the politician something to talk about, but really they should be a way to connect to voters.