Suggested Questions for Prototype Testing

So I was having a think about asking questions of our personas when we test our prototype and I was thinking we ought to ask questions in three categories:

1. Design of the remote - how easy is it to use? Is it comfortable to use? Is it intuitive? etc.

2. Design of the System/Screens - How intuitive are they? Are they easy to use? Are they too confusing/long/unclear? etc

3. Features of the System - Are there any features that are redundant/useless/wouldn't get used? Are there any features which you would like to see? Are any of the features not compatible with your home/style of living/environment?

These are just a few ideas I've had, obviously they will need some refinement, but let me know what you all think.