More than two-thirds of people in the United States--about 69 percent--are overweight or obese. And desk jobs only make matters worse. While standing and treadmill desks help somewhat, most people find the idea of exercising while working incompatible. After all, huffing, puffing and sweating don't exactly jibe with making phone calls or doing computer work.

But think about all the time you spend sitting in front of a computer--is there any potential in all those hours to burn a few more calories?

After raising nearly $300,000 on Kickstarter, Chicago-based Fitness Cubed has figured out a way to do it. Cubii is a compact under-desk elliptical that uniquely offers a set of features that may make it the best exercise machine for work currently on the market. After testing the device for several weeks, here are my takeaways.

No one will know it's there.

Unlike other office exercise contraptions that necessitate reorganizing your space, the Cubii compactly sits under your desk. And while the elliptical is ergonomically angled so your knees won't hit the bottom of your desk, silence is the virtue I appreciated most about the machine. I was able to have lengthy phone conversations without any kind of whirring or spinning sound in the background. Granted, I had the tension set low, but figure as long as my muscles were moving it beats just sitting.

It connects to your phone or wearable.

Cubii syncs with devices such as Fitbit or Jawbone so you can log how many calories you're burning. The Cubii app also lets you set reminders and create groups and competitions.

It's competitively priced.

Considering a standing or cycling desk can run upwards of $2,000, the Cubii seems affordable at $347. It comes in black or chrome and can be ordered in a pack of six for the price of five.