This is leakproof as advertised (so far), seems to be made well, sturdy, meant to last, and very easy to clean.
One of the downfalls is that it’s a little tricky for some of the smaller hands to open without tipping the box and this spilling the contents as it opens. Similarly, it’s difficult for the little ones to close it all the way.
Also, I wish the removable piece served as an ice pack as well much like some other lunch containers. It’s already removable, it would be nice to pop it in the freezer or fridge so that if I put yogurt or other perishables in the lunch box, they will stay fresh. Since there really isn’t room in a lunch box for both this bento box and an ice pack (plus the box itself seems well-insulated and doesn’t seem like the cold from an ice pack would penetrate it)
Despite those details, it’s a good product and I would likely buy more in the future (and just have my kids practice opening it several times before risking anything spillable).