The Fender strings are durable and the nickel gives them an unique sound. Compared to the D'Addario nickel wound EXL110 the Fender strings have a more country tone to them. They are both made in the USA, so the tone is intended to be so. The string gauges for the Fender strings are .010, .013, .017, .026, 0.36, .046. They do not break all that easy, in fact I think they have outdone the D'Addario strings like a month or so. The only thing that I can say is bad about the strings is that they are not flexible. If you try to rotate them the other direction with the tuning pegs the string will break. In time they do become more flexible where they are played most, but get a dark colour in these areas. However, they do not make your fingers smell like metal and nor do they leave them dirty. The Fender strings are very precise and durable and a tone that stands out of the crowd.