Instruct: Classify Amazon reviews into positive or negative sentiment
Query: good, when it works

I bought 4 of these in October of 2007. One of them stopped working within a week of being used. The photo sensor no longer worked, meaning the light stayed on ALL the time. The fade/cycle feature also stopped working. Amazon exchanged my item for a working one. Now, March 2009, another one has stopped working and is displaying the exact same symptoms. The light is decent when it works, but as someone pointed out, it's really not all that bright.