There are limitations reviewing a saddle, since what works for my anatomy may not work for yours. That being said, I really like this product. Like most riders, I'm accumulating a decent pile of saddles that I don't use, but this one provides a comfortable ride. I've used it on Ironman, long gravel rides, many century rides and even put it on my mountain bike after a lesser, allegedly mountain saddle gave me butt sores. No butt sores with the Fizik, despite the mountain saddle having a squishier feel.
I bought my first Fizik Antares one with carbon rails, attracted mostly by the low weight, and liked it so much I got a second, but with the Ki-um rails. The smaller diameter metal rails are easier to install and adjust. The weight savings wasn't that big of a deal (to me).
The pressure relief channel works great. Every bit as well as a full cut-away.
Holding it in your hand, it's very minimal (a compliment), and the cushion looks like it won't be comfortable, but it is.
Also, I like the integrated clip for the fizik tool bag for road riding. Less so on gravel, because it's hinged and bounces a bit.
I gave it a high-value rating because compared to other saddles in this weight range it was relatively inexpensive.
Thank you for your feedback.