Once we finished sketching all our various ideas we took them to class where speed dating style group critiques were held.

We found that people thought the fingerprint/face recognition sensors would be too "big brother"ish. People also thought that the shelf kiosks invaded their privacy in that if they didn't want people to know what product they were purchasing the lighted display would just make it too obvious. There were also some concerns voiced that it would be confusing to know who the shelves had lit up for: user 'x' or user 'y'. Most of the rating ideas received negative feedback: ratings are subjective and hard to understand, ratings could be tampered with, only people who cared enough would rate and therefore bias the ratings, and such other concerns.

The group critiques also gave us the most valuable feedback to pick a direction. The picture below shows our decision making process to eliminate our choices.

After this step our choices had narrowed down to two broad areas that people thought our kiosk would be useful in.

1. Beyond the label: with this idea we thought of providing more information to our users about the products that they had scanned. The feedback we received suggested that for this to be really useful the recommendations would have to be more than just stars and would have to speak personally to the users buying preferences, something like Amazon's recommendations. But we also found that some users really did not care about information and just wanted to go into the grocery store, buy what they'd come for and leave as soon as they could. Since we wanted a walk up and use kiosk that would not take too much interaction time, we decided not to pursue this track.
2. Meal Maker: During the critique session, people immediately understood this idea and gave us a lot of positive feedback. This seemed to be intuitive and easyly understood.