Light and convenience
Product does what is supposed to do. small, simple, easily pumps up my mattress without getting any water vapor in it. (I ave an Exped down filled pad - which is just great. But you should not "blow these up" with your mouth because the water vapor will damage the down. They come with a "squeeze bag" but the tiny pump works way better. also, teh light is perfect for teh tent at night.
It was great to have this to stoke up the fire on a cold night, really really great. The built in light was convenient to have and bright enough I used it more the my Helio. The down side is I don't know what all the connectors are for and the pouch they came in is a draw sting that could easily come open and let them fall out and it also tore on the seam so I have them stored in a zip lock bag. I did use it to pump up my Zero mattress and it worked as expected for that.
Love it. Way easier than using tour lungs