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Optional, but it makes responses comparable across testers.

Was today's air-quality information useful?

Was the information easy to read and understand?

Did Mark 2 help you understand your indoor environment?

Were the recommendations helpful?

Did you take any action because of a recommendation?

Overall, how would you rate your experience with Mark 2?

Did you run into any problems?

What would you like Mark 2 to do that it does not?

What could Mark 2 do better?