[rayiner]

Here is an interesting look at whether any of these sorts of devices actually work (in comparison to a real polysonogram): http://www.huffingtonpost.com/dr-christopher-winter/sleep-ti.... The answer is: most of these things claim to be able to do a lot more with simple sensing techniques than they can actually do accurately.

[gr3yh47]

If your room is too hot, sense will tell you

...in case your skin can't

if your room is too bright, sense will tell you

...in case your eyes don't

[jareds]

I have no usable vision but can sometimes tell if a light is on. I don't know if light effects my sleeping though so that feature could actually be useful.

[hoopism]

Can it sense my wife's mood and flash a certain color so I know to make up the couch?

[apierre]

If your room is too noisy, sense will send the data for further analysis ;)