Pros:
I have restrung my 19th century instrument with Jargar Classic ever since a full reglue re-align of the soundpost and general service/ clean by Ealing Strings in west London many years ago. I find Jargar Classics are pretty easy to thread into the peg hole and slowly bring up to their correct pitch. Once they are bedded-in, I love the resonant sound that they produce in orchestral tutti groups.
This is why I am happy to buy Jargar Classic on-line from The String Zone of Lancing.
Cons:
None