It’s extremely practical, especially in confined spaces, like small rehearsal rooms, and tiny stages.I finally took a look at that bag. All I can say is "why?"
I have two MONO bags, the Vertigo and the more traditional M80. The Vertigo gets the nod most often because of the top-loading feature and the boot. The top-loading means my bass is quick and easy to get in or out, and the boot allows me to put it down anywhere, inside or out, no matter whether it’s rain or shine. The automatic Headlock system also holds the neck very securely.
Now, I’ve heard people say that the design is nothing special, and that they use their traditional bags in the same way without problems. And it’s true that you can do that. But owning both types, I have to say that the Vertigo design is much less fiddly in everyday use than the traditional type of gig bag, and the protection is second to none. I think it’s great.