Pros:
I haven't put this string on the viola yet! But I can add that I am playing on a whole set of amber strings on a Don Tatem viola, and they are the best strings I ever had. They replaced a set of Larsen strings (also very good). They have a big, luminous sound, easy and responsive to play.
I look forward to the new A, as it represents a new technology: I have a similar E on my violin. Dependable, good sound, does not whistle.
Cons:
Took a long time to stabilise.
Other:
I had to pay extra customs when the products entered the EU. That is to be expected, but what was not expected: the post company in Denmark clapped an extra "administrative charge" on to the postage, so we ended with a very expensive string.
