Was so excited to receive this...after a lot of research, I purchased the Zippi and the Flippi to decide which I preferred. Immediately after receiving them, I plugged the Zippi in and it made a horrendously loud rattling noise. It seemed to be coming from the front nose piece, but wouldn't stop no matter what I did. It went straight back into the box and the Flippi was next. It's not as quiet as I thought it'd be, but it's WAY better than the Zippi, so I guess I'll be keeping it.