I just got the SLS Kit Carbonio a few weeks ago. Very similar, but no perineum relief cutout, and only 131mm wide.

Just over 500 miles on it so far, mostly in rides of 20-40 miles each. So far, so good, although when I first handled it I thought "This is what they call 'padding'? This a$$ hatchet is gonna kill me." It had even less padding than some Fizik saddles I'd handled at the LBS.

But it's turned out to be pretty comfy. Some minor aches in the sit bones/ischial tuberosities after some rides, but so minor it's hardly worth mentioning -- just different from my gel foam saddles, which cradled the sit bones but put more pressure on the perineum because everything squished down too much over longer rides.

My initial setup was very rough, lots of guesstimates. I was simultaneously switching from platform pedals/casual shoes on the road bike to clipless and Look pedals. Between the pedal and saddle change, I had to raise the seat post an inch. Rode that for a month, then felt like I wasn't getting quite enough leg extension. Raised it another 1/4" before yesterday's ride, felt much better. Also lowered the quill stem 1/4", thinking I might need to adjust the nose angle downward a notch, but it felt fine on the one ride of 22 miles. We'll see after a few more miles.

But it's very position sensitive. Or, rather, my butt is very position sensitive. I kept tweaking everything an nth of a degree and 1/8 or 1/4 inch at a time. One day I adjusted the fore/aft position slightly in response to a minor knee twinge, just above the patella. The rest of the ride I felt like I was doing pushups. Turned out I'd tilted the nose down a mere single notch. That's all it took to feel like something was way off. Reset the angle, everything was fine again.

And the Aerotech Pro shorts with their thinnest padding -- the tan and black stuff that's just thick microfiber with no loft -- may not be quite right for me now on that saddle. My Pearl Izumi and cheapie Baleef shorts with fancypants 3D sculpted padding is more comfortable.

So try some different shorts if all else fails.