Looks like it has the same build quality as the Sigma 35mm (metal barrel, ...). I have the feeling that in the time to come we could see exciting news from the lens front.
Don't feel bad... I must have had my head in the ground when this was first announced as this is the first time I heard about it. So thanks for sharing it.
The description of it got me pretty excited until I got to the part about it being a DX lens... ughh, I am all full frame anymore... if there was an 18-35mm f1.8 from Sigma for a fullframe... wow! That would really get my interest.