OK, so here are my impressions of the Z-90 in 174cm.
Skier: 5'10", 145 lbs. Working on PSIA L2.
I demoed the Z90's at Whistler on the 2nd day, which turned out to be a powder day. Oops! maybe I should have gotten the Endurance 106. Ah, well, it's all good, right? I went with Lisa's (Lady Salina/Gathermeister) and Tony Crocker's group. Tony mentioned he wanted to do a warm up run on Emerald while waiting for the alpine to open. I started to head towards Emerald, then noticed no one was around me. I glanced back and saw DanoT's jacket disappearing towards the Big Red side. I skated across and let er' rip. We were on a groomed run, so I figured, let's see what these things will do. I noticed that I didn't need to adjust anything in my skiing. My Head Rev 85's are 177, but the Z90's were just as stable and probably more so, on the groom and off on the cut up sides of the run. I quickly caught up with the group. For a 90mm wide ski, these things held an edge. I had previously been thinking I might want a frontside carver in the upper 70's- low 80's, but with the Z90 I don't think I would ever need or use anything narrower, at least in the PNW.
I'm losing track of the sequence of runs. We headed over to Harmony, one run was a fast groomer, another Lisa took us on a steep side pitch with some trees which opened up to a bowl, all in untracked or light tracked up snow. At one point Tony C led us from the top of Harmony around to Little Whistler and into Glacier Bowl. Steeps with untracked and lightly tracked snow. I think I was the only one in the group on skis with full camber and less than 100mm width, but the Z90's handled it with just a little fore-aft adjustment. It was not the best choice for the terrain and conditions, but I was having fun on them.
In the afternoon I took them on some bumps, some more trees and tracked up piles on groomers. They handled them all pretty well. Short radius slow turns, more slalom speed short radius turns, medium-big radius slow turns, and letting it rips wide turns. All good.
That said, throughout the day I was thinking to myself, "these things aren't made of pixie dust, they're not magic, they're just a good ski. I can do pretty much the same thing on my Rev 85's or for that matter my Rev 105's." I was convincing myself that they weren't actually worth $1200, to me, compared to my existing skis or a few other brands I liked.
Then, the next day, I was back on my Rev 105's, and after skiing some cut up crud all morning, realize that my legs were getting tired. I never once had that feeling with the Z90's, rather I was still feeling pretty good at the end of the day. The dampening of the Renoun skis is something you appreciate at the end of the day, and not just when you're skiing them. They absorb enough impact that they allow you so ski longer with less wear and tear on your body.
The other thing that stands out is how compliant they are. I didn't need to adjust anything, or think how I was going to ski a line, I just skied. The fact that I didn't notice any spectacular energy or characteristics of the skis while skiing them, almost obscured the fact that I didn't have to think about them, they just did what I wanted, very stable, yet very quick, very smooth.
I was also thinking this would make a perfect teaching ski. Basically, if I had this, all I would need is a good powder ski and call it good.
Who is this for: probably you, if you're reading this.
Who is it not for: someone who already has a quiver that includes a good frontside carver, and one or two or three flavors of all mountain skis, and has no need to simplify.