I just installed the THB Bury trendTalk car kit for my treo 600 and this thing is pretty nice. The volume in nice and it sounds really clear and it keeps my treo charged. Right noe I am using my cigarette lighter but if it continues to sound as good I will be going with the hard wire and even the radio muting so it will mute my radio when calls come in. I was wondering if any one else has used the car kit?