[raffraffraff]

Those things are too easy to open with a bump key. For the last 15 years I've insisted on proper secure locks and keys. The most I've ever had to pay to retrofit one is €90, and I got 5 keys with that lock. In my current house, front and back doors were replaced. My neighbour replaced his too when I demonstrated a bump key to him.

Having a symmetrical key isn't something that I even care about but I suppose it's a bonus.