Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Constant hang ups!!

What an annoying piece of hardware! The unit will hang up on people in mid conversation. There's no predicting when this will happen. Sometimes I can talk for only a few minutes, other times it's up to an hour. No tech support, no drivers (Skype has updated itself to 3.0 and still no new drivers)and the DPH-50U currently isn't supported under Vista. Think hard before spending your money on this one.