Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great Customer Service

I ordered these in September and in March I lost sound in one ear. The product comes with a one year warranty and so I emailed their customer service (available from their website). They responded the same day and offered to send me brand new replacement earbuds at no charge. They didn't require me to send my defected ones back. The new ones arrived in a few days and also include a full year warranty. I've never dealt with such an easy and timely warranty process. Their communications were prompt and effortless. Definitely a great company to work with.As far as the ear buds themselves, besides the problem I had which was resolved easily, they were great. Worked well, good sound, and no echoes from the cord rubbing up against my clothes.