Pros:
Good sounding string. Very stable for a gut string more so than the gold label G. Whether that is to do with the construction of the string or the addition of gold in the winding I do not know. Has plenty of volume and lasts a good while. Nearly 6 months in my case.
Cons:
It does not have as vintage a sound as the gold label G, which of course is not necessarily a bad thing for some people and should not discourage anyone from trying the string. It costs a lot and is second only to the Oliv stiff which I have not tried because of the price.