The lens was reviewed in, I believe, British Journal of Photography, in 1969 (I have access to it through a compilation made by Terence Sheehy which doesn't cite the source precisely). The reviewer rated it as "a very fine lens indeed"; he observed that at 1.2 image quality was a "slight improvement" over the standard 1.8 at its full aperture; at 1.4 he observed that the 1.2 lens did "noticeably better" than the standard 1.8 at full aperture. He thought that the "coverage" of the lens, corner to corner, was more even than the standard 1.8 (maybe that would have something to do with bokeh). The only negative that he reported was "fairly low contrast" and he thought that designing more contrast into it, even as the cost of losing some resolution, would increase its capabilities. The reviewer ties the design of the lens to its use at the widest aperture by those who definitely need the aperture, such as reporters, a point that has been made here by another poster. Hope this helps