Jos,
The speed will be OK. What you need to check is the number of writes this thing can handle. I've seen specs as low as 100,000 writes which can be chomped through by a database app very quickly.
Juse one other issue: why do you want this one in particular? I'd bet $$$ that this thin thing is like other thin electronic devices: you sit on it, game over. ;-) I use standard USB2 flash drives- cheap as chips, replace 'em every 6 months. I don't know about price in SA but price in NZ is about 35 Euros.
"... They ne'er cared for us
yet: suffer us to famish, and their store-houses
crammed with grain; make edicts for usury, to
support usurers; repeal daily any wholesome act
established against the rich, and provide more
piercing statutes daily, to chain up and restrain
the poor. If the wars eat us not up, they will; and
there's all the love they bear us."
-- Shakespeare: Coriolanus, Act 1, scene 1
