Is it universal?
  Is it designed for a wide range of abilities and needs?

Is it effective?
  Does it actually work for the specific needs?
  Has it been tested or at least reviewed by representatives of a wide range of users?
  Is it supported by research, design standards, or other sources?

Is it welcoming?
  Does it feel natural and comfortable for all users?
  Does it discriminate unnecessarily on the basis of ability?
  Does it give the impression of disability-based discrimination?

Will the design solution be durable over time?
  Can it accommodate change through flexibility, adaptability, or adjustability?