I wanted a display case for Optimus Prime standing up. This one works perfectly. There's enough width for the legs to be spread apart for a standing position. And there's enough depth for the display card as well as the Energon cube. It's perfect for the Optimus Prime set if you want to display it standing up.
I ended up getting this for a different set. I got it for the Batmobile from Batman: The Animated Series set from Brick Vault. It's about the size of a TV remote. The display case is a perfect size. Perfect length, width, and height. Definitely recommend.
It's a nearly perfect size. A square base that is a perfect width and length. It'd be nice if it was about an inch shorter. It would still have (I'm guessing) half an inch of clearance between the top of the set and the top of the case. But I'm fine with it. Strongly recommended.
A great size. It's tall enough in case you want to display the hood/bonnet open. A perfect length (bumper to bumper) and a decent width (door to door). Recommended.
I wish there was another option for a shorter case. I understand that this one is as tall as it is to allow the trunk/boot to be displayed open. The length (bumper to bumper) is perfect. I wouldn't mind having the width (door to door) be a little narrower by an inch. An easy recommendation.
I love that the base is a square. I wish the case was maybe an inch shorter (not a big deal). There's about an inch of space between WALL•E and the display case wall, which is perfect. Easily recommend.
Even though this is not a lego piece, I decided to use this display for my favorite toy when growing up. The Starship Troopers Shuttle. This Shuttle fits perfectly.