Review new features of the La Marzocco GS3 MP from the Specialty Coffee Expo 2017 in Seattle. Marc from WholeLatteLove.com talks with Scott Callendar from La Marzocco Home about recent upgrades to the GS3. A new conical valve for real-time manual control of water flow/brew pressure allowing for more precise extractions from lighter roast and single origin coffees. A new Cool-Touch wand for drier steam and better microfoam. The La Marzocco GS3 is a high-end flooded group espresso machine for serious home espresso enthusiasts!