Oh it's better than no VRR for sure. But I don't think it feels good compared to a locked consistent but lower framerate.
For me, how it feels will really depend on how stable this "45" target is. If it's just unlocked with a 60 cap, but framerate jumping from 30s to 50s, then that's definitely no good. Generally hanging at 45 w/ VRR would be nice, but who knows.