Instruct: Classify Amazon reviews into positive or negative sentiment
Query: great sound, drive you crazy connectivity issues

I had this for a couple of months and while people I talked to said the sound is good and I could also hear them, the frustrating issue was the thing would connect to the phone half the time and not the other half (treo 650). I checked the manuals and did everything right, even powered off and on between calls like it said to do, but it made me so frustrated. The infrequency of it made me enraged. It seemed as if it was deciding for me who it would let me talk to and whom it wouldn't. I reached my peak of frustration and said enough is enough.