I recently decided to get into lockpicking (what better nerdish hobby?), and am very dubious of these types of locks. I noticed, that after picking a lock one or twice, I can pretty much do it automatically afterwards. Without replaceable pins, this would probably go into my bin of “conquered locks”, without the benefit of being actually useful when something needs locking.
Now if it could simulate being an old rusty padlock, with worn pins and sand and mud in the tumblers… That’s a different story, since I’ve learned that those are a bit thougher than most pristine locks I get to practice on.
Any idea where to find a cheapish practice lock that can be repinned? I’ve seen them on Massdrop, but I’ve also noticed that Massdrop is generally more expensive than other sources.