I ordered this bed for my guest bedroom in the full size. According to the website the full and the queen size are of equal length, which was odd, but it seems both measurements were off. I called customer  service before ordering and they confirmed the size differences with the manufacturer. My full size mattress fits great on it. 
At first when you start putting in the slats, they look flimsy and we thought they would break during the first use. To our surprise, as soon as we put the mattress on it and laid on top, it felt reassuringly sturdy. I probably wouldn't jump up and down on this bed, but it can easily handle the usual bed-related activities...