The big thing on radient bubble "stuff" - specifically the research I read in regards to housing (you'd be surprised how much a house "lives" and breaths like a human being) - is that you need a 1/4" of space to reflect into AND the reflective surface has to be very clean. So I can see the tent working and a good idea, but not as a sleeping pad.

More info than you ever wanted to know, but http://cchrc.org/docs/reports/TR_2011-01_Reflective_Insulation_in_Cold_Climates.pdf