Good in itself the capacity / price is really attractive. By cons USB 3.0 throughput level could use some work ... We are no closer to an excellent speed USB 2.0 throughput than USB 3.0! (BTW I tried on two types of port and I have the same results!). Anyway, 64GB 25, it remains very competitive, and rigor I do not look up a key to the speed of light but just a mobile storage space, so it suits me, but attention to those seeking faster speeds because they will be disappointed by this key!