Daddario XTAPB1047 Extra Light

Smoothness of the surfaces is the first thing that got my attention.
I use them on my multiscale headless acoustic from Kiesel and this set really works well with the extended scale of my model.
The sound from piezo is closer to expectation then any other string set. The clarity and overtones is unbelievable (for me this effect is greatly amplified due to adjustable saddle).
The sustain and fullness is amazing at those tensions.
I will report back on the coating and durability after few more sets

I've tried all brands of strings but I always come back to Daddario. These strings are feel light to my aging hands but they give me a full sound like I would get from a heavier set. They cost more than normal sets, but the long life makes the price premium worth it. I've tried Elixirs and they are undoubtedly good; but Daddario strings feel and sound better to me.

The winding of the 6th string just blossomed in my hands. Horrible quality at that price

Having played many sets of uncoated D'Addario strings, these clearly sound somewhat more metallic. Intonation was slightly off because the previous set was thicker, but after adjusting the truss rod accordingly, it's spot-on. I know I prefer the warmer sound of uncoated, but I'll post an update in two or three months about how fresh the tone remains.

They feel a tiny bit more rigid, too. I have uncoated strings of the same gauge and brand on another acoustic, and they feel slightly more flexible.