Finally got myself a Sigmalux! 
First impressions:
(+) Exceptionally creamy bokeh
(+) Very usable sharpness wide open
(+) Great sharpness from around f/2.2 onwards
(-) Noticable greenish bokeh-fringing at f/1.4
(-) AF is sometimes a bit hit-and-miss compared to my 30mm f/1.4 and my 85mm f/1.8
I'll wait and see how the AF thing works out. So far, it's not too terrible.
Since I plan switching to a 7D later this year, I'll probably wait and see how it performs on that camera before deciding on sending it in for calibration.


















