Needle Valve- A pre-brew flow rate of 120ml a minute can be easily adjusted with a small turn of Slayer's needle valve. This precision flow rate control lets you dial in your pre-infusion step down to the milliliter.
The Slayer Shot- This controllable pre-brew opens up the ability to recreate classic lever machine profiles, or to open up new profiles just for single origin espresso, with higher repeatability and control. Extra-fine grind settings, full-saturation pre-infusion, and flavor isolation are all possible.
Gear Pump- A commercial gear pump offers the ability to raise or lower brew pressure.
Touch Screen Menu and Shot Timer- Accessible settings and an automatic shot timer make precision effortless.
PID Temperature Control- A rear-mounted digital control set lets you dial-in temperature as accurately as any other variable.
Made in the USA- Assembled and bench tested by hand in Seattle, WA!
Pros
Repeatable Variables- Slayer keeps track of every espresso machine-side variable: temperature, pressure and flow rate stay the same shot after shot.
Classic Profile- Slayer's method of low pressure pre-infusion creates a flavor profile reminiscent of classic lever machines.
Touchscreen Control- A digital touchscreen mounted at the back of the drip tray makes for easy parameter adjustments at the flick of a finger.
Cons
Plumbed Only- A small complaint on a machine of this caliber, if you're looking to run a pop-up or coffee cart you'll need a flojet or similar reservoir pump.