Not good enough.
The other important thing is that if you touch down in Annex 14 TDZ (which you describe perfectly) you may have already invalidated your LDG performance data by 500+ meters.
Avoid confusing the TDZ marking and lighting on the RWY with what the actual landing zone for the sake of A/C performance is.
For instance, the aiming point is always at 291 m past the threshold for a 3° profile with 50' THR crossing height.
While the Aiming Point Marker (as correctly described above) per Annex 14 only start at 400 m, or even 450 if the local authority decides on the longer runways.
I do agree that NO LANDING beyond the distance stripes EVER is an excellent rule. But even that might be too far to form a proper habit, 750 would be my number for that (5th stripe).