Anyone use a NFC business card like Tapt?

Wondering if it’s worth getting one of those nfc business cards (like Tapt). Instead of handing out a paper card, you get a plastic card which you tap against the other person’s phone and it transfers your info to their phone.

Does anyone use one now? How do people respond to it?

The one downside I see is that with a paper card, you can see later who you met since you have the card on hand. But with the Tapt card, the person‘s details are just in amongst your contacts so you don’t know if you just met them or if you met them ages ago.