Pros:
Super value and they suit one of my fiddles that is a bit fussy about what strings it will tolerate. An excellent alternative to some of the more expensive strings, without compromising on tone or quality. not yet sure of their durability but seem fine after a month or so. Recommended if you want a quality sound without breaking the bank.
Cons:
They do take a bit longer than average to settle in as they stretch over the first few days but not likely to be a problem for most.