I rate it with 5 stars, because the device does what it should. It runs and runs without problems. Thanks to USB 3 read and write speeds are correspondingly high. Currently run with me two older, different sized hard drives with the JBOD setting in the device (as a download buffer). So who an external USB enclosure is considering to purchase (especially Kapa for 2 hard disks in RAID) well served with this unit.