Even though I live reasonably close to Boston, I wasn't intending to go to the FDOI ceremony for the stamp, but I did buy the stamps at my local post office on the first day of issue and mailed a couple back to myself at a mailbox that I knew would carry a Boston, MA cancellation.
I don't know why I even try ... when this is the end result ... both the date and city name are only barely legible (and some may argue they aren't legible at all)!

For anyone unfamiliar with the spray-on postmark, it goes back to the Innovative Choreographers stamps and is supposed to read
"Just Dance", but you'd hardly know that from first glance.