I have been using these strings for several years now on my j-style basses and been using them for different kinds of music (pop, reggae, jazz, old school funk, blues).
The D?Addarios sound well balanced to my ears and are suitable for many styles of music.
They deliver a quite well balanced tone with a good ?zing? but they do not sound too aggressive.
I think the playability and feel of the D?Addario strings is just right - not too sloppy not to stiff
The ball ends of the strings are colour coded, which is a nice touch, that makes changing strings even easier.
I play roughly 1 to 2 hours a day and never had problems with rust/oxidation on the strings (I wipe them down with a cloth after playing, though)
How long do they sound fresh? Really depends on how much you play them:
I play/practice around 1 hour a day and found out that after about 1 week the sound has mellowed out pretty much, which, for me is only a concern if you need a lot of high-end in your sound (slap).
Well balanced and well-proven bass strings at a good price. Good also for beginners that want to find out what?s their favourite tone.