"Improvement over the original design in every way"3.5 starson by littleman00
Pros: Above average sound quality. Handles low and mid frequency sounds decently. High range has a few problems. Design is much smaller and more comfotable than previous model, and a little more flexible, too. Decent battery life. Volume/mute buttons.
Cons: Headset is prone to interference. Takes a little too long to turn off. Smaller form factor means they eliminated some basic music controls like next/previous track, pause, etc. Can get uncomfortable after a few hours.
Summary: While the design is quite old by now, it's still a decent pair of wireless headphones if you can find them. Online they run anywhere from $30-$70. Logitech still supports them through their website. My only real complaint is that they recommend you have the receiver somewhere on the right side of your body to prevent interference. This works sometimes and walking around a large city like San Francisco, you're bound to hear slight gaps in the music.
The headphones are also quite durable. Anyone who's owned Logitech's previous model knows they broke very easily. I am, however, a little annoyed they didn't make a model with iPod controls.
Overall, for the price, they're great.