I've been using these strings for one year, for many genres and styles, but especially for rock, hard rock, alternative, some metal...I really like their sound, powerful basses and nice highs in the solos (I use them on a Epiphone Les paul studio) .
Their life is long enough, I play and practise guitar at least one hour every day, and I change strings approximately every six weeks (before the sound starts to change too much)...until now I've never broken one
Pros: Good sound, endurance, price
Cons: no one at the moment