The AeroCreeper definitely works well out in the hangar or in the shop. The adjustable height and angle levels make it easy to work close to the ground or at a more mid-level. It doesn't require any special tools or equipment to adjust the height which makes it easy to transition it from one position to another depending on the task.
A few improvements that would be nice would be more grip or texturized surface on the seat portion to avoid slipping while wrenching or working for longer hours sanding. Additionally, you have to be careful when rotating the whole unit around when you are sitting on it so that the back wheels do not bang against something.