First, the rates are rather low for the USB 3 (some keys exceed 200 MB / s read and 100MB / s write).
Then, these figures relate only to large files (sequential speeds). As soon as the file size decreases, the flow rates are collapsing: on small files (4 kb), the key is just over 8 MB / s read and 1 MB / s write!
But the highlight of the key is obviously its tiny size, combined with a stylish design and practical (attachment possible).
In short, a good buy, but who could get 5 stars if the performance had been up (including writing).
Note that the 8GB and 16GB versions have advertised speeds below 32 and 64 GB models.