Totally clear, like the old-school all-acrylic cases, are hard to find these days. They were fragile and easy to crack.
Modern "clear" cases are usually steel or aluminum frames, and have plexi, acrylic, or tempered glass panels, and they're much, much more sturdy.
Originally I would like a full acrylic case, but I wouldn't want to take the risk if they have a bad reputation. Thanks for the info