There are many reasons not to like this:
1) He just turned 35. He's coming off of a season (one of his better ones) when he slugged .455. How well do you think his slugging percentage will age? Steamer has him projected for .431 next year.
2) He basically doesn't have a defensive position, and would clog up the DH slot.
3) He has a projected offensive WAR of 6.5 next year. From a guy with only one skill, that is unacceptable.
We like him because he's...left handed? Who cares? Let's get some good players in here, regardless of handedness. This would be just another cheap, second rate post-prime pickup that we grew to expect from KW over the years.