The flash stick is very easy to use, once you have set up the installation software that encrypts and reads your fingerprint. It can be a little bit fiddly at first since it takes multiple readings of the digit you want to use to be identified by. However, there is plenty of storage, which is easily accessible, but all the more importantly, is secure: if you were unfortunate enough to lose it, then there is minimal chance the data you saved on the flash stick will fall into the wrong hands or be used inappropriately.
My only minor quibble is that it compatible with OS-X, and I prefer to use Macs at home, so cannot transfer data from work to home via the flash stick. However, it clearly states on the packaging it is only suitable for MS Windows. The casing is robust and durable.