We design and install custom iPad stations that companies can set up anywhere that allow their customers to easily submit immediate feedback about their experience ("How was your visit?", "Would you recommend us?", etc.) and sign up for mailing lists or other promotions. We have a few pictures up at [login to view URL] if you'd like to see a few styles of our stations.
We handle all the equipment, branding, and setup, so companies can just focus on the feedback. Our clients think it is pretty fun to track their customers' moods and customers get a kick out of using the stations too.