I love the Bumbo, and the addition of the tray makes it more versatile and allows the chair to grow with baby as they begin to feed themselves. The chair is made out of a super awesome foam like material that not only is super comfy for baby but it also is super easy to clean. The tray is made of a hard plastic and is also super easy to clean. They are great for babies as soon as they become supported sitters until they are almost one. The tray allows baby to play or eat and feed themselves. They are a little pricey but I personally think they are s good investment, and would recommend them to new moms. Sturdiness They are very sturdy almost surprisingly so for what they are made of. Durability They are very durable, I've used them often in daycares and they have stood up well. Design The design of the chair and trays are simple but cute, the chairs come in a lot of different colors and they have come out with slipcovers for the chairs with really adorable patterns. Safety These are safe. Very safe. Ease of Cleaning Super easy to clean.