My DR SS Lo Riders gave up on me. The E string became thumpy and the G string broke, so it was time for a new and different set of strings. I decided to try EB Cobalts since I read they were very durable. Here is what I've noticed about them so far: They are the loudest strings I've ever tried (I've tried Fender NPS rounds, EB Slinkys (Nickel), Rotosound Swing Bass 66s, and DR SS Lo Riders). They are so treble-y and twangy, like a guitar, so midrange-y and loud, they sing like no other string I've tried, so punchy and deep like a bass, and so harmonically rich, like a harpsichord or piano. Very awesome strings! The only con I can think of is they might be to overwhelming! (At least for me they are sometimes!) Cobalt strings are excellent, and if these have long life, I'll probably be hooked!