Pros:
+ Great for restringing guitars you play for classic rock, jazz/blues as they have this smooth feel to them and richer tone. Great for ensuring tuning stability, especially with use of the tremolo arm on Strats and other non-floating bridges.
Cons:
- Will not fit some guitars such as Gibson style tailpieces and some others so check sizing before purchase
- They have a more stiffer feel to them, making bending slightly harder