I bought a Störz & Bickel Plenty in April. I had recently had my Volcano stolen and wanted to buy a replacement. Instead of spending $500+ on a new Volcano I chose the less expensive Plenty. It was under $300. The unit is easy to operate, and makes very good clouds of vapor. The heating element does have an auto off function which requires you to squeeze the handle to turn it back on. I keep the temperature setting on 6 and it works great. The auto off truly is my only complaint, and for about half the price as a Volcano plus the starter set for bags, it can't be beat.