The Sound 510 headset upon first use was not A2DP ready. I had to visit www.soundid.com to upgrade the firmware first. I did this by just plugging the headset into a computer running Windows (Mac download not available=Fail!). The download consisted of an update program for the headset. After the download was complete, the firmware was updated within a minute. The update allowed me to hear my personal ringtones over the headset when I had incoming calls. It also allowed me to play my music using the iPod app over the headset. This really worked well. The iPod app displayed a Bluetooth toggle allowing easy selection between the built-in iPhone, audio jack or the headset.
There were issues I had with this after a few hours of use. There would occasionally be a disconnect from the Bluetooth connection and when it reconnected, the audio would automatically come through the headset rather than the audio jack where the audio was last coming from. This would force me to go into the iPod app and bring up the Bluetooth toggle to shut it off. Another issue with the A2DP features was that when listening to my music or podcasts, if I was to get a phone call and answer the call on my headset, upon hanging up, I would have to hit play on the iPod to start the music back up again where as before, the music started again right where I had left off before the call. I am hoping these bugs get smashed with another firmware update. Finally, there is the EarPrint companion iPhone app:
This app offers a few additional features that are more geeky then useful. What is useful is the battery meter and decibel level indicator.
What's not so useful yet still kind off geeky cool is the tools menu which features 3 toggles:
1) a status light indicator for your headset
2) a noise reduction demo that can only be turned on in the middle of a call (rendering it just about useless)
3) an environmental mode for when the headset is not in use which uses the 3 built-in microphones to amplify the noises around you enabling you to hear better as the headset stays in your ear (but creates a hum which to me was more annoying than useful)
There is also a personal setting where you can drag your finger around the screen while in-call to try to attain your preferred sound settings. (I found this did not really work, at least not enough to notice.)
To sum this review up, a liked this headset enough to donate my Plantronics Discovery 975 to my wife to use with her iPhone. Although, it has it's quirks, it sounds way better than any Bluetooth headset I have ever owned when on a phone call. It is light weight and comes in a small size that fits very comfortably. It looks very nice. The companion iPhone app adds some geeky eye candy but is still kind of cool regardless. I would recommend this headset to anyone in the market for one. The Sound 510 is one I will be sticking with for awhile.