I spent the weekend recently at the Marriott in Round Rock when I was in town for the F1 race at Circuit of the Americas. It isn't terribly close to COTA, but being located right on the tollway, it was an easy drive. (80 mph speed limit helps!) The staff was very helpful and friendly. The room was clean and the furnishings were comfortable. The bed was very nice being soft but offering enough support. Two types of pillows were available so selecting the level of firmness was easy. Also, there were enough pillows that sitting up in bed was pleasant. The bathroom had a modern shower-only design. My room was on the 6th floor and was very quiet. The room had useable desk space but no in-room refrigerator. The gym was small but well equipped for a hotel of this size. As is usual in this price range, wifi was only available at an extra charge.