I didn't have a problem with the function of the Stelvio shock.
But I didn't enjoy the extra height, both at the seat and the change that the extra rear height made to the steering.
No matter what I did at the forks, tyre pressure, etc I couldn't find a happy place.
I got the Hyperpro with stock GRiSO shock length (and optional length adjustment so I could play with incremental height increases).
At first the Hyperpro was too harsh and I thought I'd stuffed up.
After speaking to Pete about it on a trip we did together, I backed off the high speed compression a lot more.
Now I don't give the rear suspension a single thought while riding, which says it all really.