I just tried a set of gibson pure nickel on my guitar and I really like them better compared to the the RPS strings. BUt, I like the construction of the RPS with e extra wound at the ball end.
The R&R strings are pure nickel, not nickel wound.
I don't break many - actually, it's very rare that I break one - it's just that I had been using the RPS for a long time and think the design is a good idea.
I play a PRS McCarty now - I can't play the small ebmm necks anymore...