I do not have one, nor have I tried it. But I’ve heard first hand testimonials on how well it works. Being at a lot of the same shows as Scott (owner of Cake Safe) I have been by his booth when I’ve heard customers brag about how it has saved them this or that cake during travels. I’ve never heard anything negative about it, except maybe how people wish it was cheaper in cost.
But of course I understand that what I have heard is kinda one sided so it will be interested to see what other replies you receive.