I like it because the Sox basically acquired a younger, cheaper version of Johnny Damon. Actually, if you look closely at Coco's and Ichiro Suzuki's 2005 numbers, you will see an awful lot of similarities. It was Coco's first full year of PT and he will still continue to get better. He moves from an extreme pitchers park to an extreme hitters park and will be a fine leadoff man.
It also gives the Sox options too. Next year, or if Manny is traded, Coco would be a fine LF making it possible for them to sign an Andruw Jones or trade for Torri Hunter. He would be a HUGE defensive upgrade over Manny.
The reality is, with Marte, you just don't know what you are gettting. He has been traded twice this offseason. He has had a lousy DWL showing. He has been rumored to have some injury issues. He could turn out to be Eric Chavez-- sure. Or he could turn out to be Josh Hamilton or Sean Burroughs- two mega _prospects_. More often than not, prospects disappont. Also, the Sox have plenty of depth at 3B with a very good overall glove and stick in Lowell and a 3B of the future in Youkilis. Trading from strength is a smart move.
Coco IS a proven star in this league and at 26, has time to become a superstar and one of the best at his position. I give the Sox credit for making this move.