Is it a good pick? Yeah. Is it a great pick? No.
It's a wild card. For every perceived strength, it can be used as a weakness. Look it his experience. For a canidate running as a Maverick outsider, he chose a Senator in office over half his life. That's change you can believe in. For his foreign policy bonafides, ther's the fact he voted for the Iraq War. For every a noun, a verb, and 9/11, there's a clean well spoken Black man.
Nevertheless? Considering McCain's probable VP choice, this means a debate win for Biden. Also, if the tea leaves are true, Obama's shifting toward the Economy. OMG MCCAIN DOESN'T KNOW I'M INSIDE HIS HOUSE!
Put it this way. He's charismatic. He's full of piss and vinegar. And he just may be able to charm the pants off the punditocracy.
He may not be a better class of Vice Presidential Candidate, but in an elction like this? He may actually get votes. Victory for the Dems? No. Not going to say that.
But the momentum has definitely shifted