Product review (3 stars): The price made my decision, but kit quality is poor
I decided to go the refillable route after checking the price for the ready-loaded product. The kit has a styrofoam plug that you need to install in order to keep the replacement beads in the right place. I shoved it in to deeply, and had to break it in order to remove it. The plastic container that you use to convey the beads was cracked out of the box. I should have returned the kit, but I needed the humidifier so I just taped it together. Still the cheapest way to go, but I wish the tools were sturdier.