I like water pillows, and i sell a lot of them.
they are not as scientifically precise as the Boveda/Humidipack, but can be used for so many things.
have a leaky desktop? having to refill your beads too often? throw a pillow or 2 in with the beads. the pillows hold a lot of water for thier size, and also throw off a good amount of humidity. the beads will absorb any excess humidity.
pillows are a very safe way to season a humidor. put a few in your new humi, and just let them sit. when they shrink down, its a visual indicator that you need more seasoning. once they stop shrinking, your humidor is seasoned.
i put a water pillow in a humidor jar, and use that jar to recharge my bovedas.