Grind size, coffee amount, and tamping technique can all affect the pressure needed for a proper brew. Espresso extracted can vary based on grind size and amount, and adjustments may be necessary. This single-serve brewer has a 40oz removable water reservoir, charcoal water filter, and removable drip tray for travel mugs. It is compatible with all single cup pods, including Keurig K-Cup pods and HomeBarista elite. The 30-minute auto-off feature will save energy and money. It is compatible with ground coffee filter (not included). Please refer to the user manual for better understanding.