I use them (when I can get them at a sensible price) in preference to all others. They sound good, with just a tad of "not quite too bright" tone that takes "B-honk" off, and they last me for ever and ever, which is good since I have guitar-acquisition-syndrome and otherwise if I change the strings on every guitar every month it is both expensive and time consuming. My camping guitar (a Morris) I play them all festival season and change them at the beginning of the next festival season. The 12-strings and the decent guitars they last about two to three months.

I play pretty hard, but I only ever broke one once (it was a "G") and the set had been on about 6 months.