I've had this for a year now and it's starting to give me problems. The people on the other side of the call complain of hearing a high pitched whine and lots of line noise.

Mostly good except for poor radio reception. DAB is ok but the normal radio is not great (and it's not the antenna).
Also the FM stations wont go past preset 4 unless you are quick shuffling up and down, ie goes from 4 back to 1.
Sometimes when you are away from DAB it will go back to preset 1 not the one you were on.
The blue tooth adapter (purchased separately) often doesn't log back onto the iphone. Not sure if this is a fault of the head unit!!
Not the brightest displays. I basically have it on blue because its hard to see other colours in the daylight.
Everything else good!

Installation to my JVC KD-R520 was simple. Bluetooth connection to my iPhone 4s was seamless. Connects automatically each time I get in my car. Push button on KS-BTA100 and music starts.

The JVC KSB100 is the best value anywhere. I checked several sites before choosing this particular one and highly recommend it.

EASY TO INSTALL & A PLEASURE TO USE TAKES ALL THE HASSLE OF FUMBLING FOR PHONE WHILE DRIVING & EXCELLENT SOUND WHEN PLAYING MUSIC

I bought this item with the stereo that suggested the blue tooth adapter. I was amazed at how easy it works and the quality is great. No one ever asks me to repeat myself. I do have the cord to the mic running up the side interior and it hangs on the left corner of sun visor out of my line of site. I believe this unit works better than the Parrot system I have on my Suburban and it was less money.

I bought this to run on my JVC deck because I work on an army base and you can only use handsfree phone devices. It never has a problem connecting to my phone and audio/call quality is great. Plus I like the streaming music feature as well. Great accessory. Highly recommend.

Everything came as promised and works perfectly.

I'm able to play music from my phone and make or receive telephone calls wirelesslly, just like or surpasses what they equipped modern vehicles with. Great handsfree device can't live without it.