BlueAnt S4 Bluetooth Car SpeakerphoneProduct Review (submitted on September 19, 2011):
Some time ago I purchased a hands free car kit called Cellport. it was the type of equipment that had to be hard installed and the price was not satisfactory for the product. I'm sure there are other products out there of the same caliber. However, there may also be other products out there which may be even better than Blueant ST3 and S4! To this day, I have not run across them. I don't know about other customers but I can speak for me by saying, This is one of the better hands free voice activated kits I have run across thus far. The voice command prompt responds immediately, the speaker is clear and as loud as you need, the unit is portable without extensive wiring. The GPS turn by trun function is out standing. I have Navigon Mobile on my iphone and this is the only unit I have found that pairs and work great together. I give the unit two thumbs up!!!!