My Tacx Vortex was not very accurate and it would get less accurate as it warmed up. Also, in the youtube video the guy talks about the resistance range of the vortex. You can only get certain power in certain gears with it. That was news to me and explained some of the weirdness I had with the Vortex.
I’m on a Kickr and I’m 500% happier. And I just take the power from my Stages so that inside and outside power all comes from the same device.