Love this and I hope it will be actively managed.

I see a lot of laptop bags that are clearly outside the current size limits.

In terms of putting a handbag up in the bins - I now think I''ll trade a bit of footspace for the good of my bag. I've had several nice bags ruined by people ramming in their hard sided bags into a pretty full locker. Zips or wheels applied at force can do quite a bit of damage to leather.