I visited Olio during lunch on a weekday. From the photos, I thought it would be bigger than it actually is. You can see right into the Sheraton lobby while you are eating. It's not as elegant as some of the reviews I've read on Yelp say it is.
We started off with the crab cakes which were great. I also had the chicken and brie panini which was also good. My experience wasn't spectacular so I would prefer to eat at the other restaurants options by the airport.