I got intrigued and got myself a premium subscription for a month. Turns out it is a parametrized plan generator with about 7 templates.
“Personalization” lies in the basic quiz you take about your goals and (I guess) analysis of the recent training load from Strava.
The plan it suggests for me is just a repeated progression of the same workouts: low RPM, threshold, long.
I can see that more features are planned, but so far looks much more boring than TrainerRoad Plan Builder with Adaptive Training. Much cheaper though. And should still be effective if complied to.
I’m going to try it too. Probably from next Monday…