SD gave me two sets as compensation for work done a decade ago. I like them, but I do not "love" them. I, in fact, put them in the last two LP bodies warmoth made (for me), and I didn't care for the entire mix. Looked great but open coils (if not double cream) is not my look, and the tone was too clean and almost brittle for me to like. The note separation was extreme, to such a degree that it was just not pleasant for me to play through/play with. I ditched the guitars a year ago for pennies on the dollar and I have zero regrets. I don't miss the pickups and don't want them back. I have other pickups I like more. I think the whole silver wire thing is just not for me.
The pickups I associate the most with the Zephyr Silver pickups, is super-low wind filtertrons and widerange buckers. If that's your jam, then the Zephyrs are for you. Otherwise: don't.