Pros: Speakerphone works, although people at the other end of a call complain that it sounds like you are speaking underwater - ie slightly garbled.
Cons: This "bulk" item came in a plastic bag with photocopied instructions. Given the small scratches on the plastic pieces and slight wear and tear I assume this item has been refurbished. I feel like this was falsely advertised (and priced!) as a brand new item on new egg. I'd return it but it's just...
Summary: If you have a noiseless car, this is a good product, other than that, no so much. I have had this product over a year, the thirty buck they want for it now is reasonable for the quality of the product.
Pros: Small - Takes "normal" USB charger - Easy operation - excellent battery life
Cons: Lights are so bright when you drive at night one would think the police are behind you. Honestly, you can see this thing blink from space! Extremely distracting Noise cancellation, there is zero, it picks up every bloody sound on earth!
Summary: I'd like to rate this a 1, but manufacturer defects are acceptable. It happens. I can hear calls clearly, but no one can hear me at all. I even called my phone from my land-line (I set my land-line to mute, so that I don't get echo feedback).
Pros: Small, loud, good price, and I like how it also has a purple LED to let you know the phone is turning on or off.