Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Good MP3 player, when it works

I bought this player about 6 months ago and have had a continuous stream of problems with it ever since. First, the player locked up on me, and they told me it was a software problem. I tried to install the new software on it, but that didn't work so they sent me a new one. A few weeks later, it did it again, except this time I was able to install the new software and get it working, but I had to go to all the trouble of putting my music back on it all over again (which takes a while). Now, once again, the player is not working, and the Rio software on the computer doesn't even recognize the player anymore, so I'm sending it back yet again.When it worked, it was great, but its not worth all the hassle. If I coul do it over again I would definitely NOT buy this player.