I was pretty meh on it myself and then looked up on BA that Bourn had a 4.7 WAR season in 2009, a 5.3 in 2010 and a 6.0(!) last year (put up 3.0 in 2011) (Fangraphs has him at 4.9, 4.7, 4.1 and 6.4). I was not expecting that at all. Yeah, Bourn has silently been one of the more valuable center fielders in the game. Exceptional defense, solid hitting ability, exceptional base runner, and a knack for drawing a decent amount of walks. But he's 30, and will command an ass load of money and his legs could break down sooner rather than later and that would effectively kill most of the things that make him valuable