I got my PQI Travelling Disk model U172 about 2 years ago, just when the prices of USB flash drives have started to go down. It is only 1GB, but it is very sleek and light at 10g.
What I appreciate about it is the speed. My computer reads data from the drive pretty fast. And I like it because it comes in a hard plastic cover, unlike my Compaq, that has a rubberized replaceable cover, but after awhile, the rubber expands from the heat that the drive exudes. So my flash drive is now indecent because I can't find a suitable cover.
Anyway, after 2 years, my pqi is working very well. Of course, I maintain it like scan it for viruses and bad sectors everytime I take it out. And yeah, it doesn't have bad sectors yet. I think I really got a good deal for my money with this kind.