I have used just about every brand of acoustic strings out there at one time or another.
Elixrs last for sure but for me personally I dislike their feel and I'm not overwhelmed by their tone either, not that it's bad.
I seem to always come back to EXP 11's. They last me a decent amount of time of course depending on how much I play them on a constant basis on any one guitar.
On some of my Mahogany backed or walnut backed instruments I use EXP 16 phosphor bronze. Just like the tone of those on that type wood backed guitars.
Then again, my strings get changed on all my guitars about once a week, sometimes sooner depending again on how much I use that particular guitar.
I personally have never had any D'Addario strings perform dead right out of the package, not to say it couldn't happen. I have been playing just over 58 years now so I have had the chance for it to happen.
It's nice to see that they are concerned about customer satisfaction.
They (the EXP's) have a feel that doesn't seem "slippery" to me like Elixrs do.
Of course everyone has a different perception of what sounds and feels best to each individual