Very disappointed I am by the upper grid lock. I have my Siamese cat (she weighs less than 4kg) want to bring to the vet when my grid lock together are broken out of the housing. And that on a busy street. I reacted quickly and the grid the loose in my hand dangling down immediately on the box to happiness. A big shock for me and especially for my cat!
As the box was overall quite good (I tried some and brought back), I have again and bought me the same a shoulder strap and matching roles (roles for the Box Capri) to buy. Handle dismounted and ready is the perfect transport box. I've recently a documentary about cat shows seen on TV because it is actually someone's Main Coon cat has worn in exactly this box by the handle. I think everyone can imagine how I rumgezappelt on the couch ...;)
The box itself is great! But please, please do not carry by the handle! Shoulder + roles are (for me) a really good solution.
Nevertheless: We ordered a box with handle to carry it, and then you can not do it (I would never do it again!), So 2 stars less.