Doing verification tests (https://jlopp.github.io/metal-bitcoin-storage-reviews/why) yourself or sending them to be tested by specialists will earn them a good reputation.
Here is a list of good services (https://jlopp.github.io/metal-bitcoin-storage-reviews/) and some tips if you want to buy or check that the tool you used will really help you if disaster strikes.

The recommendations are:

• Simpler is better - more pieces means more potential points of failure.
• 304 Stainless Steel is the best.