OCIA.net takes a look at the Mountain Mods U2-UFO Duality in their latest review.

You would expect something of this size to weigh a ton, but thanks to the aluminum construction, the total weight is only 15 lbs. A total of 12 fan mounts ensure that your components will be kept nice and chilly. Six drive bays should be plenty for most users, and the ability to hold 18 hard drives will give you more than enough room to hold all of your pr0n, err... documents.

Mountain Mods U2-UFO Duality Review