I really like the convenience of a bluetooth visor unit. I was optimistic about the T305. The pairing was easy with my blackberry curve, I understand how to turn it off when I leave my car so it won't answer when I don't want it too. The sound quality on my end is fine but I have endless complaints by the folks on the other end that it sounds like I'm in a trash can, they can't understand me, there is too much background noise. I have gone back to using the speakerphone on my phone which is not optimal either. I am going to try the Blackberry VM 605, the reviews seem to be quite favorable but then the ones for the 305 were also. I need to have good enough sound quality to respectably run my business. All of the choices are very confusing and I will be very glad if I can find something that works and sounds more professional.