Para sa akin ang the best po at Tested ko na:
KINGSTON:
Advantage:
- Almost lahat ng international standards nakuha na nila (one of the oldest brand)
- long warranty
- easy to spot original from fake:
ORIGINAL 'G2' usb end nowadays has embeded serial# unlike sa fakes wala

Disadvantage:
- High cost
- best brand ito kaya maraming china fakes nito sa mall, ingat tayo
lalo na ung 16GB china versions eh 4GB lalo laman... or ung mga price is almost less than half sa commercial malls... naka-hack for looping files.
PQI:
Advantage:
- heavy duty ito. kahit mahulog (it happened to me) 2 meters high - no cracks nor dents
- heavier ito compare mo or i-weigh mo sa iba
Disadvantage:
- Some models look ordinary or common
- High cost, hindi bumababa ang price kahit old model
SANDISK:
Advantage:
- also one of the oldest brand
- popular sa US lalo na ung 'Cruzer'
- superior quality
Disadvantage:
- High cost din hehe
- ayoko lang ung swivel versions nito masyado maluwag