We also spent a night at the AMS Renaissance a couple of weeks ago. We checked in fairly early ( around 10:00 am or so), the front desk person was very nice and we got a room right away. The next day they let us have a 3:00pm check out (may have been Plan benefit). They did not upgrade us to Executive Floor but we did have a nice room and Executive Lounge privileges (again, Plat benefit). Michael in the EL was terriffic, attentive and helped us get dinner reservations for that night.

We had just spent 4 nights at the AMS Marriott and if we went back we would choose to stay at the Marriott over the Renaissance because we prefer the location better. We were upgraded to a room on the Executive Floor at the Marriott.