Wow I had no idea this existed! I checked for competitors a few years back and there was nothing at the time, so this looks relatively new - and also quite promising. I'm glad I clicked on this HN link, thanks for the pointer.

I fear they may follow the same course as Zeo at those prices though. For typical consumers I would imagine only the most fervent "quantified self" types are going to be comfortable spending $500 for sleep tracking.

I'm interested though :)