Comfortable mattress, small in size when folded although it is slightly heavier than expected. I couldn't use the built-in pump with just 1-2 attempts. However, I will say that it inflated relatively quickly and easily with the mouth. The valve it has prevents air from escaping and allows you to take your time if you run out of breath. On damp ground, it probably needs a cover underneath or a good sleeping bag, but I think that's expected for an air mattress without foam. Overall, it is of good quality and comfortable even with continuous use for multiple days, and it did not deflate or present any issues.

I believe the pump works even though I couldn't figure it out at first, but I will come back once I investigate it further and see how it exactly works.