I experienced problems with mine where the sound would glitch out to the point where I couldn’t hear anything. It only worked about 1/4 of the time I turned it on, and even then it might only work for about five minutes before glitching out again.
Woot gave me a full refund for my purchase.
I purchased this off Woot. It was used for about 30 mins each day. Less then 6 months later, after charging it, I noticed the battery indicator was in constant “charging” status, the voice sounded like a dying robot, and 2 days later it died. It would not charge or turn on. After reading reviews online, I found these were all very common issues.