I'm pretty sure you'll like the lens. My only quibble with it is the size, but it's worth it for the speed I think.
I couldn't decide between the 2.8 and 2.0 Biogons so I purchased both and shot with them for a while. I decided to keep the 2.0, but that 2.8C is a fine and small lens. The 2.0 does intrude into the 35mm framelines on the Ikon, but I actually had to go and check to be sure; it's quite minor.
Anyway I wanted to share a few comparison shots for you, but you already went and bought one. :-) Perhaps someone else will find them of interest. These images are bigger than I remember so sorry for the size. I shot these last year as I was deciding between lenses. Both lenses performed well for casual photography but I wanted to see if a noticeable difference would emerge if I (for once) used a tripod and took identical photos. The first two are at f2.8 and the last two are with the Biogon 2.0 exposed at f5.6.
I scanned them on a Nikon Coolscan - this one is a full size crop of the one above.
Enjoy your new lens!