So, after using these for a bit, PCB-mounted in my JD45, with variable weighting and Hack'd by Geeks SA keycaps, these are my thoughts:
I LOVE THESE SWITCHES!
I have always been a fan of stock clears, especially when lubed. I was never a big fan of the "ergo" mod using either stock light Cherry springs, or the Korean 62g spring, in either of the gold or standard varieties.
These Zealios, in the 62g version, feel exactly like 62g lubed ergo clears to me. I have these on the outside switches, where my pinkies would hit, so they feel okay there. I would not really prefer a full board with 62g switches, because, as I stated earlier, I've never been a huge fan of ergo clears.
The 67g version I have on the inside keys, and they feel most like lubed stock Cherry MX clears to me. Which I have always liked. But I have always felt lubed stock clears were just ever so slightly too heavy, and that's the feeling I get from these as well.
The 65g version is my "Goldilocks" switch. These feel just right. If I were to pick one weight out of the three, this would be it. As CPTBadAss said in his review, they feel very smooth and consistent all the way through from top to actuation to bottom out. I have these on the middle regions of the board,
The lubed versions of the Zealios that I received are ever so slightly smoother, but not enough to warrant the extra effort required, in my opinion. There are some who will always want lubed switches, just to have the very best experience they can get. But I am the type who would love to have a switch that I can install as-stock, and have an experience 80% or more of what the lubed version will get you. And about the same as what a lubed Cherry MX switch gets you.
So, after actual typing experience with these installed in a keyboard, I can tell you that my strong preference is toward the 65g spring version. When these are offered for sale, I will be buying large quantities of them.