I am almost decided on this lens but being quite color-sensitive I am fraid the color may not be as good as I would be happy with it. If it is the same / on par with L-glass color or EF 50 1.4 color, it is fine with me and then decision is easier 
My other option would be 17-40 f4 even if it cannot compete regarding brightness, sharpness or IS.
This is a lens for wedding 



