Only problem, the flow is very limited, even more than on ordinary USB 2.0. To be concrete, the average write speed is about 6 GB per hour (measured flow by copying the key 6.5 GB of medium sized files 400 KB in Windows 7 with a PC). For information, this key: Kingston - DataTraveler 101 Generation 2 (G2) - USB flash drive - 16 GB from the same manufacturer, the same capacity and a comparable price, easily reaches twice, while others are still much better.
Note that I do not have software to test the flow rates I simply divides the size of files transferred by the transfer time. Furthermore, only the write throughput interests me because it is always lower than the read speed. This is not reading problematic, at least for the use that I have (backup documents).
To summarize: if aesthetics or durability are paramount to you, you will not be disappointed, but if you do not want to waste time during file transfers, it is perhaps better to look elsewhere ...