We used ME on 5/7 - 5/11... we did NOT have our luggage tags either, but everything worked out great! We just went to baggage claim and picked up our own bags. A very helpful CM printed bus vouchers for us at the ME check-in desk. Our plane landed at 6:25 PM and we were at ASMu by 7:45 PM (with 2 stops before us). The return trip went great as well, the bus picked us up 5 minutes ahead of schedule (6:55 PM) and we were at the airport by 8:00 PM... plenty of time to get through security for our 9:45 PM flight.
For those of you who haven't received your ME tags and vouchers... don't worry. The helpful CM's let you pick up your own bags (if you want) and they can print bus vouchers right there at the airport. It all worked out great for us, and we'll be using it again in September.