Previous HN conversation on it is at https://news.ycombinator.com/item?id=11687463. TNW article about it is also pretty decent - http://thenextweb.com/gadgets/2016/05/16/dash-elsewhere/

I suppose in the article I should have mentioned that I expected the button to be able to fire whatever HTTP payload that I wanted. Probably an odd expectation of mine, but that's the price I pay for my day job seeping into my night life.