"Good, but I'll stick with the Jawbone"3.5 starson by TCIII
Pros: Sounds great to wearer
Cons: Noise cancellation not as good as Jawbone
Large and heavy
Summary: I've used the original Jawbone since it's release and just lost it while on a business trip. I needed a quick replacement so I purchased the Voyager Pro. It does a good job, in fact the audio for the wearer might be a bit better than the Jawbone BUT - the audio quality for the listener is not as good - and after years of the Jawbone's smaller size - this thing feels huge. It's not uncomfortable as it wraps snugly behind your ear, but still feels very large when worn.
It's good as a backup - but I just placed an order for the Jawbone Prime.