Structured, honest feedback on a design concept – what's working, what isn't, and the question nobody's asking.
The questions a good critic would ask – not to be difficult, but because the answers matter.
Specific observations, not empty praise. If you can't say why it works, it doesn't count.
Aesthetic and experiential observations – separate from whether it works functionally.
The most uncomfortable honest challenge. If it stings, that's the point.
Concrete actions based on this critique. Do these before the concept develops further.