I like the story and photos from initial idea, to prototype, to contract, to production. He doesn't really dig into why it didn't sell well. But it's a good story.
It also looks great and someone (you?) should submit it in the future. Email hn@ycombinator.com if you do and we'll put it in the second-chance pool (https://news.ycombinator.com/pool, explained at https://news.ycombinator.com/item?id=26998308), so it will get a random placement on HN's front page. But it would be best to wait at least a few weeks, maybe even a few months, to let the hivemind caches clear.
I like the story and photos from initial idea, to prototype, to contract, to production. He doesn't really dig into why it didn't sell well. But it's a good story.