I use it with my juvi crested and my leopard gecko and it has worked out quite well. Paper towels are (in my opinion) the easiest, but the liner is more aesthetically pleasing and makes for a nice compromise between paper towels and a more natural substrate, such as coco fiber (which can be ingested during hunting). I actually came across the liner in the color brown today, which I had never seen before.
What do you mean by "don't feed lives" ? As in, live prey like crickets, roaches, etc? If so, I don't see why that would be a problem. I actually think the liner makes feeding live prey easier, as the gecko can't ingest the substrate.