I have only used once so durability is still a question. Normally I forget to bring a pillow on my adventures, I will not leave without this. One of the best nights sleep I have had on the ground in a while. Plus it can be used as a stuff sack, not just wasted space in your pack. No blowing up or waiting for the fill to take it shape. I used my fleece, first tried rolling it, to firm for me. Once I stuffed it in like you would your sleeping bag, Perfect!
Works well as a stuff sack and reverses into a comfortable pillow. Saves space in your backpack and is light weight.