Pros It works great with Iphone4 ,fit is great. sound quality in and out great
Cons nothing so far
Summary Over the years I have owned all brands of bluetooth head sets. Sound id 510 is the best so far. I also have Jawbone Hero and Plantronics Pro. Jawbone I had problem people hearing me I had to repeat myself all the time. Plantronics Pro was good but It would not play music through headset. Finally there is a bluetooth headphone that works great with Iphone4. I am very happy about it.
Pros Sound quality is very good. Earpiece is comfortable. Must update the firmware to have it work properly also very cool if you have an iphone and download the free app. Very pleased with the Sound ID 510.
Cons can't turn the music on and off from the earpiece. The music will not start automatically after answering a call. I have to unplug the phone, plug back in and turn the music back on.
Pros Light weight, sound quality is perfect, music sound very good and the talk time is six hours which is longer than Jawbone, blue ant, and plantronics. I love the App>
Cons Not really a con because I get email updates, but when the I Phone has a firmware update the 510 needs to be updated as wel. I guess if you want to use an App you have to get the updates, it does only take four minutes or so.
Pros EarPrint definitely makes this headset superior
Cons None really.
Summary Overall the best headset I've ever encountered.