Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Cheap but slow; cannot be used by Vista's ReadyBoost

The Kingston 1GB DataTraveler flash drive is very cheap -- it can often be found for free after rebate. It's small and convenient, but speed is quite lacking. Copying files takes a long time. Worse, I just found out it cannot be used for Windows Vista's ReadyBoost feature (which speeds up system performance) because Vista deems it too slow.