1) The mounting, cleaning and installation of the dust filter is made quite delicate. Although I have thanks to the filter dust-free to a large extent housing, cleaning the dust filter is but really annoying. The suction with a vacuum cleaner is not readily possible, but above all the filters at the bottom of the case is not suitable if you own a carpet.
2.) Conventional mechanical hard drives transmit their vibrations completely undamped and unentkoppelt on the rest of the housing. Most do not bother me, but if times both my 2TB disks work, then you can hear the clear.
Finally, I give 4 out of 5 stars because the housing for a low price is a discreet design with (optical) quality materials. In practice, the housing has only two weak points, but considering the price and the range of functions, then that is still ok.