I'm reviewing/evaluating one in depth on The Beretta Forum. This pistol is not yet available and has not been reviewed elsewhere yet. So far, I'm impressed. It shot nicer than an M&P9c and really feels "right". I don't make it over here often enough, but wanted to give a heads-up to everyone here since it hasn't been reviewed in any magazines yet.
EDIT: I forgot to mention that it uses a rotary barrel, standard magazine holds 15 rounds, and it has ambidexterous slide catch levers.
If interested, you may find the thread here:
FIRST LOOK: Beretta PX4 Compact 9mm Review and Comparison
I'll try to check back at least once a day here.