Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Unstable - the worst piece of hardware I have

I experienced what many users here also experienced. My MA111 is a pain in the back. Bought it after better experience with a MA101 but could not buy another MA101 - so I bought the first available one from my local store without looking at reviews. What a mistake!First my Win XP machine started rebooting time after time. After I upgraded the driver of the MA111 from 1.1 to 2.0 the machine is no longer crashing uncontrolled but I get breakdowns of the wireless conection by the dozen a working day. Intollerable! I did not buy mine at amazon - so I cannot return it for a refund.