For its price, it would be quite good if it didn't lose air every 2 hours from the valve. Maybe it was just my luck, but the valve system seems to not be the best construction.

I have had it for 3 years, I am really satisfied. It improves things a lot on uneven ground due to its construction, and it inflates quite easily with the mattress. It has been used in difficult terrain conditions and it has not punctured or anything. I don't give it five stars because I am of medium size and it is quite narrow for me, meaning that if you move your leg a little, it comes out. So, for someone larger or taller, it would be quite narrow and short

Very good and easy to transport (no comparison with other self-inflating mats). Because it contains air, it is much more effective and comfortable on uneven ground. The only negative is if you don't have a pump to inflate it, it's a bit of a hassle to do it with your mouth and it doesn't inflate enough, so when you kneel, you can feel the ground underneath.