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About the Satori Smart:
Think of this is a regular trainer with full ANT+ and Bluetooth Smart broadcasting of power/speed/cadence like the Vortex above, but with the downside that you have to manually control your resistance via a little lever. But, at this price point you’re effectively getting power and the ability to complete wattage based workouts successfully – with roll-down calibration. And that’s important, as it’s a step above Virtual Power seen in apps like TrainerRoad, because it can ensure you get accurate results each time due to the calibration component.
Cadence is a bit meh IME using a Garmin (ANT+). Apparently it's better on a phone etc (via Bluetooth Smart), or you can pair a dedicated cadence sensor.
The tacx Neo looks fun. It has a light underneath it that changes colour proportional to power. Nova drivers will be well jelly.
Cardiovascular drift is a thing.
You can get a 'smart' trainer with decent power pretty cheap now. I've been using the Satori Smart.