Smaller volcano chamber w capsules can be convenient

This product may increase the efficiency of the volcano especially for smaller volumes. But to get the best yield you have to do what you would normally do with the full sized chamber - stir and maybe re-grind. It takes longer for heat to produce adequate vapor so the first bag is often light. It seems to use induction in addition to convection to vaporize. The solid metal ring absorbs and holds considerable heat. It produces the most vapor when hot. Convenient to pre-fill capsules and then toss in as needed. But expect bits of abv and grind to get spilled during the process as it is inherently messier. The capsules are reusable if you are nice when handling them. Without the capsules, ground materials flow from the chamber to its rim where they don't seem to get vaporized. Different fills and packings don't improve matters. The capsules do fix it. You can use this by itself, it just isn't as beneficial and I'm not sure it does a better job than the full sized chamber would -- when used without capsules. I'm mostly happy with it but recommend people avoid it unless they also want to use the capsules. Good product overall. Reasonably priced and beautifully made.