Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Worked great for about 30 minutes

What a piece of junk. I've had to return two of them and that was an absolute nightmare. Linksys' customer support is the worst! I'm not kidding. I waited 2 days for a call back, then the technician did nothing but insult me. When I finally got the replacement, it didn't work either. They finally sent me a working unit (I have about 3 weeks invested in this now) and it is all scratched up, obviously used. Oh well, at least it works.