My only cons are the pods can be a little tricky to pop out at first and it would be nice if they include two extra pods. I also find it a little tricky to find the air holes/mouthpieces without looking because the device is so smooth.
Other than that, it's an automatic draw, compact device with an innovative concept that I would like to see more of. The Khree UFO starter kit currently cost $39.99 and additional pods are $2.99 each. It also comes in the colors of Black, White, Red and Blue.