Well it really depends on how well you want to sleep.
I've heard of others using the material you are talking about, it works.
I use 2 kinds of pads, both light weight.
An EZ-rest folding pad and now with it a Big Agnes Air Pad
(Red, air only). Together they are lighter weight than a self inflator and much more comfortable.
If I get a hole in the air pad that I can't patch I still have the EZ-rest. The EZ-rest aslo gives better insulation than the Air pad alone (air only so very little).
In the past I used the same type system but instead of the air pad I used a short self inflator to save weight. Now I have less bulk,less weight and more comfort.