UPDATE: The double-charge was an issue with the shop, not Coinbase, and the money was automatically refunded a few days later without contacting them. An important thing to note is that the refund was given using the USD conversion rate at the time of the refund a few days later, and NOT the original crypto amount. This resulted in me getting 0.027 ETH ($8.38) less back into my account than I paid.
This card arrived this morning, was super hyped for it.
Unfortunately I couldn't get into the app to demonstrate it, I assume you can toggle the default crypto used for payments in the app.
The card is available to UK customers only for now, but they're apparently planning to expand to the EU in the future.