The build quality is impeccable. Focusing is smooth as silk and the aperture "snap" a clean.
At the beginning is a bit of practice are needed, if, like me, never had a manual lens. But if you've done a few pictures with it, you can take the focus clearly without problems.
The image quality increases significantly if instead Aperture 3.5 a panel 8 or later.
Price performance is really top, if you can do without autofocus. Photometry works on my 450D continues.
Have appended a picture Ex.
