I have been actively seeking customer feedback. I have given away about fifteen music players. I had a table at the Seattle Maker Faire. And I've also gotten feedback from makers that otherwise found and made the project. For clarity, I don't sell anything, so I don't really have customers. But I want the device to get into the hands of people that need it, so I treat everyone like a customer as best I can.

Feedback from people with dementia:

• People with mild to moderate dementia can usually operate the device!
• Brings joy.
• People with severe dementia usually need help from a caregiver.

Feedback from caregivers:

• The device is not mobile, and some users naturally wander.
• It doesn't integrate with the Apple iTunes-driven system associated with the national Music & Memory program. (the device can play Apple music files, but of course the iTunes app does not recognize the device as an iPod).
• But also, a caregiver suggested that the music files on a USB thumb drive approach is easier than the iTunes approach.
• Caregivers have suggested that the device is a good fit for part of the general senior living population, not just those with dementia.

Feedback from makers:

• It's pretty easy to make. e.g. At the Maker Faire, seven people did live builds at my table, successful in each case.
• A 3D printed case would be nice (the current case is laser cut wood).

From prospective customers:

• This is largely based on the 150 or so conversations that I had with passers-by at the Seattle Maker Faire.
• Those prospective customers that know someone with dementia generally immediately recognized why the retro/simple design makes it dementia-friendly.
• Those who don't know someone with dementia were puzzled -- why is it dementia-friendly?. After a few sentences, they got it. But I could do a better job of making this clear in the signs, in the name of the device, or possibly in the design of the device.

There is more feedback. But the above is a decent summary of key comments.

There isn't much time left. So most of the above comments are for a post-finals version. But I have done a little experimenting and I'll publish the results in the next project log.