thanks. kul from Tagstand here. Submitted this to see what HN had to say. We've been working on NFC Task Launcher (https://play.google.com/store/apps/details?id=com.jwsoft.nfc...) for a while now, which is similar to this Samsung app.
I used to be really sloppy at muting the phone at night and this cures that. My wife is a light sleeper and I can now make sure I am not waking her up at stupid o'clock in the morning when I get an email overnight.
I bought a bunch more tags from Tagstand and I am looking forward to finding more stuff to do with them.