[someacct]

Yeah, I'd like one just to figure out how much I'm really sleeping and how much of that is deep sleep, etc.

Hardware-wise, it sounds a lot like the old Zeo Personal Sleep Manager. I was interested in getting one of those, but then the company went other and shutdown their API, bricking all their devices. I hope these guys don't make the same mistake.

[stcredzero]

I am currently in the process of reviving my Zeo Sleep Manager.

http://imgur.com/rHZmTY3

I can replace the lipo battery with another one with the same capacity. However, I will have to expand the case. My current plan is to seal the battery in a few layers of aluminum tape and to 3D print a "gasket" system.

The company going out of business doesn't "brick" anything, at least for my older system. There are programs that can read the data format.