This is my third try at a bluetooth headset and I've finally found one that I'm happy with.
Tech: It is loud enough that you don't have to put your finger in your other ear, it's easy to tell if it is on or not (blinks every two seconds), the other person can hear you without much interference, it charges quickly and seems to hold the charge for an adequate amount of time, and it automatically picks up the call when you dial out or answer a call. My last Motorola did not do this. You had to dial the number then click either the headset or the bluetooth button on the phone to transfer it. The Samsung does this automatically. (I assume most headsets do this since no one comments on this, but this is an important feature.)
Fit: This is the major drawback, it will not fit in or stay in my ear, but there is a simple solution. I am not sure exactly what Samsung was thinking with this design. I have medium to larger ears and I could not get this headset into my ear at all. It simply hung precariously from the small "u" at the bottom of my ear and I actually had to set it for the opposite ear to accomplish this. I am not sure what this little hook thing is or why they call it a hook - it doesn't do ANYTHING. But, I liked the functionality of the headset so much I decided to purchase some Jabra ear gels and see if they would fit. This worked like a charm and my Samsung now fits snugly in my ear canal and never fall out. There is a marginal loss of volume, but it is still adequate. With this fix, I would highly recommend the headset as a great value, and the best one overall that I have tried. It is great for someone who wears glasses too as it doesn't go over the ear.