For performance of this key it exceeds that of my external hard drive 3.5 and 2.5 External USB 3.0
Testing with cystaldiskmark performance is even beyond the manufacturer since I arrived (after formatting exFAT) a + 300mb / s read and + 150mb / s write.
In practice transfers from one MKV are longer 180MB / s, ideal for moving large files, for smaller files moint writes are fast but has an average 90MB / s.
in terms of aesthetics the key is large enough but nothing shocking, be careful not to lose the cap on the net you can see that the key is equipped with MLC chips (the same type of chip in the Samsung SSD pro)
The blue LED is very well hidden we do not see it at all except when it lights
Finally for those who want a good key and have the means do not hesitate, I hope what not will fail within a year anyway it is guaranteed for 5 years kingston.