Great for microdosing! Pro: Save on herbals Helps open the air path if kept clean Cons: Adds to the loading and cleaning time a bit difficult to get into the chamber if you're a bit clumsy Caution: Do not unload the chamber when still hot, the glass may break! Ironically.. even though the small one did break.. I still use it and it has an added bonus, it reduces the chamber size while also opening the air path still further! If you like a less restricted airflow.. I wouldn't say break it on purpose but.. Happy accident.