Hi Doug, got the Zyx UNIverse and you are right. It sounds very impressing right out of the box. I "cheated" a little bit with the "burn in" time, I did use the AT 637 for some time, but I think, it will increase performance.
Anyway, I listened to quite a lot of Cartridges ( Benz, Koetsu up to 11.000 $, Clearaudio, Allaerts and a few others - most with a Klyne 7 Phono Stage - and I know, that taste is different, but this one will chase all these down the block and back again. It shows, what Benz, Koetsu's, Clearaudio etc. really are: Overhyped, overpriced and more or less average. And compared to others, this one is reliable, had one some years, never a problem.