The matte plastic exterior of the Latitude 3390 is unlikely to turn heads. That might be the intent with a business-use machine, but there's no getting away from the fact that this 2-in-1 is about as utilitarian as they come. The chassis feels stiff enough, but the lid is flexible and could use reinforcement.
As with most convertible 2-in-1s, the Latitude 3390 works best in Laptop mode. Its 3.47-pound weight makes it feel like a thick slab in Tablet mode. The Lenovo Yoga 720 is just 2.83 pounds by comparison. In addition to being heavy, the Latitude 3390's 0.77 by 12.76 by 8.85 inch frame is closer in size to what we expect on 14-inch notebooks.