Well, I restrung this morning and had about 20 minutes to play before lessons started.
My initial response is that there is definitely a tangible difference in tone clarity and output, both in a good way. They definitely seemed to enhance my metal/rock tones with no need for tweaking, and for clean tones, especially my country, I was able to use my bridge HB instead of the middle position to get a nice glassy tone where as before, using the bridge HB on it's own had been far too bright and no amount of tweaking really seemed to help.
In regards to how the strings feel, well, I love how they bend.....not that I had any issues with bending before, but the Cobalt's really make bending in general a more pleasant experience if that makes sense.
My biggest let down at this point, is the feel of the wound strings, particularly the 6th and 5th, feel kind of rough to my touch and at some points, it almost felt like my finger tips were getting a bit stuck....... though I reckon this may just require a period of adjustment to get used to them....