Johnson Controls GLAS smart thermostat review: Hey Cortana, I'm cold!

The GLAS smart thermostat is the most beautiful smart thermostat to hit the market since Nest shook the industry out of its complacency back in 2011. And just like Nest before it, GLAS manufacturer Johnson Controls has taken an approach no other thermostat maker has to date: It has embraced Microsoft's Cortana digital assistant. Few would argue that the GLAS isn't beautiful. The device is dominated by a 5-inch translucent OLED touchscreen that's mounted to a small base housing the brains of the unit and its connections to your HVAC system. Unlike most other thermostats, which have their wiring connections on a backplate that the display half attaches to, the GLAS's wiring is accessed from the front, hidden by a removable panel.