Features
The phone (Figure 1) looks and feels well-made and fits comfortably in the hand. As with most compact phones, you'll find it hard to cradle between your shoulder and ear. But if you're going to use the phone hands-free you're probably better off using the headset jack anyway.
Figure 1: DualPhone in hand
I found myself moving the phone around to properly get my ear properly aligned with the speaker because the earpiece area doesn't have effective physical differentiation from the surrounding surface. My other physical design nit is that the placement of ringer transducer (which is also used for keyclick feedback) is placed such that my hand tended to cover it and very effectively reduce its output to a whisper (Figures 2 and 3).