Clamps: Could Do Better
The clamping procedure is really puzzling. You first have to remove the casing to get at the two screws on top that work two clamps under the wheel. Like most people, I didn't read the instructions and started by myself before thinking it might not be a bad idea to do so. Once these two screws are tightened, you then need to tighten another one from underneath the desk to make sure it is quite stable, and even with these three points, you still need to screw like mad to prevent the wheel from moving. This system is not exactly straightforward and definitely inconvenient if you want to move the wheel around a lot. The Microsoft system is much better.