Metal smells strong and leaves a film
The metal smells unpleasant and leaves a film on your fingers, which makes me uncomfortable letting my cat bite on it. An amateur test for metals came back positive – I can't say anything about the reliability of the test, but combined with the other unpleasant impressions, I'd rather steer clear. In the end, it's just a piece of wire with bits of paper, and it's pretty expensive for that. Disappointing.