My experience thus far (stay yesterday):
1. I registered for the promo
2. I made a reservation with an SPG Amex on the account
3. I checked in using the keyless, it didn't work, so manual intervention was necessary at front desk to finally get it to work (never got a physical key).
4. Checked out and paid with corporate card (Visa)
Normal points posted, but not the promo bonus points yet. Will update with status.