The Mighty: Sony 24-70/2.8 GM Review.
“A superb full-frame lens for a hugeh price.
it has the same high performance as the ultra-pro Canon 24-70/2.8 L II and Nikon 24-70/2.8E VR, for the same price” says Ken Rockwell.
However he also states that this lens is some how crippled by not having built in image stabilization.