We were on the Oct. 11th sailing on the Ryndam to the Mexican Riveria. This was the 1st week that you could choose the Open Dining Option. We choose the 8:00 assigned seating. Yes, the lower level was for the Open Dining and the Upper level was for assigned seating. Because it was the first week, I don't think they had their act together. Our waiter was really not on the ball because his help was helping on the lower level. We received items we didn't order, and didn't get things we did order. This was over the entire 10-day cruise.