Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great.......Then terrible

I bought this microphone for my singing machine. It worked great, and I loved it, and then after 1 month of minimal use, it stopped working. I called Nady and they told me to ship it to them for a replacement, but I had to pay $15 for shipping. I waited a month, and they never sent me a replacement. Finally I called them again, and they said we'll ship the replacement tomorrow. I eventually got it, unfortunately they sent me a refurbished replacement. I used it once or twice, and then it stopped working. My other microphone still worked great with my karaoke machine. I called them today, and they told me they'll ship me another one without me having to ship my old one. They told me that after this one, they can't send me any other replacements. Nady's quality of their products is TERRIBLE. The cheap one that came with my karaoke machine worked better than Nady's. Finally, when I bought this microphone on Amazon, it was $25. Don't waste your money or time on this.