I never thought the design of an ice tray really mattered until using Oxo's no-spill ice cube tray! Our freezer is often packed full and I was literally able to set the tray in the freezer at a tilt without it spilling. It was easy to fill and drain the excess water. Even better, I didn't have to struggle to pry out the ice cubes when I needed ice. I tapped one side of the cube and it just slid out of the tray because of the rounded bottom. I also really like that the ice is covered while sitting in the freezer.