I am using this product to cool both my Mac Mini and my G Drive. They both just happen to fit perfectly. Knowing that extended exposure to heat is one of the easiest ways to burn out your hardware, I thought I would be proactive and try this setup. At most, the top of my Mac Mini gets just slightly warm to the touch.I expect this fan to extend the life of my devices, assuming the fan itself lasts a while. That is left to be seen.The design of the fan itself is great. It is flat, which is one of the design features that I was particularly looking for. The fan has a connected usb to connect to a power source but what is really cool is that there is a female usb connector on the backside of the fans male usb connection, allowing you to still utilize your usb port. The fan feels rugged and uses hard plastic for the lower components and a metal grill for the top surface. This is an important feature because there are tons of cheap fans on the market that can literally collapse under the weight of a laptop computer which is simply ridiculous.The fan is black so matches most setups aesthetically.It also uses one big single fan, rather than a series of smaller sized fans. The most ideal setup for this type of product is to have one mid size fan in the middle with a smaller size fan at each of the four corners. These fans are obviously more expensive but this is really the optimum design to cool your electronic devices. This is the only drawback I can think of for this product but when you consider the price, you are getting excellent value.I didn't personally feel I needed a higher end fan, so I am perfectly content with this. I only withheld a star because I cannot speak for the durability of this product yet. 

Question: How is the design?
Answer: The design of the fan itself is great