I found these strings very good. Daddarios always have that bright and crisp tone and last longer than a lot of other roundwound strings. However I prefer a lighter gague of string (.045 to.130) so I find these perfect for downtuning a whole step while retaining the tension of a lighter gague at standard tuning. Also the fact they are nickel means they are easier on your frets and fingers, while retaining the higher tension of the nickel wound strings.
I've been using these for a good few years, I don't remember having broken any whilst playing - they are very reliable - unlike other brands (elixir & ernie seem to break a lot on me) and they sound great :)
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