Even though the R NINE ONE is aimed for home use it has all the elements taken from Rocket’s Commercial machines. Let’s start with the boilers: it has one for brewing and one for steaming with respectively 1.9 L and 3.6 L capacity. The coffee machine is also fitted with a saturated group head for an incredibly stable temperature flow. But the party piece of this machine and the reason you will want this is the incredible pressure profiling system which allows you to dose the amount of pressure at any point of the brewing. You can save up to 5 different pressure profiles or select the manual pressure profile when you feel like experimenting. To select the exact pressure at any time there is a knob on top of the group head which you turn from left to right in order to select the desired pressure. You will be impressed with the precision of the knob, turn it just a few millimeters and it will change the pressure-flow instantly. In the touch screen, you will see a very cool line chart that will record the time and amount of pressure at each point of the extraction. Another function worth mentioning is the timer to program the on/off of the coffee machine. You can program it for each day of the week and it’s very intuitive.