"The best of the Aliphs."4.5 starson by SSGPat
Pros: The charger is small which is nice for travel. You can upgrade your firmware on the beta site (which is beta like Google is). You can downgrade your firmware on the beta site. Fits in ear without outside support.
Cons: Doesn't seal the ear with the ear-piece and exterior noise can make it hard to hear. Wind still bothers the microphones, but not as much as past models.
Summary: I really think that this is the best Aliph. I have had the original and the prime prior. The simple on/off switch is a delight. With a firmware upgrade that I have used, I can change the volume and it pretty much stays at that level no matter who calls or how good the connection is.
Could get a little better in windy conditions.