Never open the case

Benefits:
-Quick (Connecting)
-Easy
-If You its existing HDDs treated reasonably well need to buy any external HDD.
-No Installation. Under XP allles via Plug & Play.

(Cons :)
-Data Transfer with USB (2.0) is not as fast as IDE / SATA
-Sometimes You have to re-infect the 1-2 USB connector until it detects some HDDs (sooner or later always klappts)

Conclusion:
People with slightly higher hardware wear have the öftern sometimes lying around a few hard drives. To check this quickly or create backups, this device is ideally suited. As a permanent solution, but I would not use it.