I have been using sony micro vault 16gb for 2 years.i bought it from amazon at 380/- the pendrive is usb 2.0 it is said that its very fast.but I had very bad experience using sony micro vault 16gb as the write speed of the pendrive is very slow and the read speed was just ok.
After a year of use the write speed and read speed of the pendrive decreased about 70% now its very hard to use the pendrives.some times the pendrive is not recognized by the computer so I wont recommend this product to others.