Lovely... actually stunning but too big for me. My upper limit is 42mm ... and I love gold watches and Speedy. This would be a no brainer if the diameter was 40mm or less.
Just a matter of personal taste, but I don't care for gold on any Speedmaster. I'm also rather traditionalist and only count the original 105.003/145.012/145.022 and 2004 3570.40 versions as 'proper' Racing models.