I love this glass. I don't use it often but when I do, It makes me happy. One of the sharpest glass I have along with the Otus and 200-400 ext.!
On a streetphoto in Prague
5D III, 24 f/1.4L II, 24 TS-E II, 24-70 f/2.8L II, Otus 55, 70-200 f/2.8L II IS, 70-300 f/4-5.6L, 135 f/2L, 200-400 f/4+ext.