Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: Beware - avoid this product

Basic functionality doesn't work properly. I had the following problems with it:1. Shuts down on its own randomly.2. Hangs every few days.3. Firmware upgrade didn't work.4. Tried again and it came back with the unit set to Japanese.5. Client utility works sometimes - not always.6. You have to initialize the unit often.