I'm also flying in over the beginning on July, asked about transportation options, and the need to apply a DSU, not sure how many people have booked over the times I will be there. Staying for a short period and don't want to burn a DSU two days.

EDIT with reply from concierge at the hotel regarding transportation options:

At this time we do not have a transportation supplier selected, we apologize for this inconvenience, however we would like to suggest you some options that are available for your service:

(We are located next to “The Royal Hotel” in Playa del Carmen, please select that hotel as a reference in the browsers.)

CANCUN EXPRES
Prices:
$117 UDS (Round Trip)
$59 USD (One Way)
*Private Transportation
*You can make reservation Online
*Take payments with Credit Card & Pay Pal
Telephone: +52 1 (998) 195-3274
E-mail: [email protected]
Web: http://www.cancun-express.com/

CANCUN SUTTLE
Prices:
$140 USD (Round Trip)
$90 USD (One Way)
*Private Transportation
*You can make reservations Online
*Take payments with Credit Card & Pay Pal
Telephone: 1-888-414-0017 and +52 998 848 0335
E-mail: [email protected]
Web: http://www.cancunshuttle.com/

LOMAS TRAVEL
Prices:
$315 USD (Round Trip)
$110 USD (One Way)
*Private Transportation
*Support Online
*You can make reservation Online
*Take payments with Credit Card & Debit
Telephone: USA 314-669-6871
Web: https://www.lomastravel.com/transfers.html